Search found 72 matches
- Sat Mar 16, 2019 7:01 pm
- Forum: Calculating Work of Expansion
- Topic: 7th Edition, 4.B.13
- Replies: 2
- Views: 499
7th Edition, 4.B.13
The question asks you to calculate an irreversible expansion from 4.52 L to 6.52 L under constant external pressure of 1.00 atm for part a. The answer to this should be 2.23, as the change in volume is 2.23 L and the pressure is constant, but the book puts it as 226 J. Why?
- Sat Mar 16, 2019 3:46 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Midterm Question 6
- Replies: 6
- Views: 933
Re: Midterm Question 6
Please, provide the full question when possible since we don't have full access to the midterms. Thanks in advance! :) “4 Moles of butane (C4H10) are used for cooking. What mass butane id this? Will this combustion do expansion work? Calculate change in internal energy for the rxn. Assume rxn will ...
- Sat Mar 16, 2019 3:09 pm
- Forum: Second Order Reactions
- Topic: 2nd order rates
- Replies: 6
- Views: 797
Re: 2nd order rates
I’d look through the textbook/notes and memorize concepts and formulas relating to third order rxn. Anything that isn’t mentioned probably isn’t necessary.
- Sat Mar 16, 2019 3:07 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Midterm Question 6
- Replies: 6
- Views: 933
Midterm Question 6
For question six on the midterm, you add work and change in enthalpy to get change in internal energy. I calculated 19.1 kj for work and 11.5 kj for change in enthalpy—how was my change in internal energy -11.5 kj?
- Sat Mar 16, 2019 2:28 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Midterm, Question 2.B
- Replies: 3
- Views: 439
Midterm, Question 2.B
Since the researcher’s publication was the reverse reaction of the original reaction, wouldn’t her equillibrium constant just be the inverse of the forward reaction’s equillibrium constant? If not, what is it supposed to be, and why did I get points taken off for my answer?
- Fri Mar 15, 2019 12:53 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Reduction Potential of Water
- Replies: 1
- Views: 265
Reduction Potential of Water
What is the reduction reaction and potential of water that we must refer to when covering topic 6.O?
- Fri Mar 15, 2019 12:42 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: 6.N.15 7th Ed
- Replies: 1
- Views: 279
6.N.15 7th Ed
"Calculate the potential of a cell constructed with two nickel electrodes. The electrolyte in one compartment is 1.0 M Ni(NO3)2. In the other compartment, NaOH has been added to a Ni(NO3)2 solution until the pH = 11 at 298 K. Use Table 6I.1" I’ve found the concentrations of both nickel ion...
- Fri Mar 15, 2019 1:44 am
- Forum: *Enzyme Kinetics
- Topic: 15.67
- Replies: 2
- Views: 906
Re: 15.67
Think about it like this: You have two reaction rates, and you want to compare how the factor is affected by the addition of a catalyst. You know that adding a catalyst changes the activation energy; you know that changing the activation energy changes the reaction rate; you know the formula for the...
- Fri Mar 15, 2019 1:40 am
- Forum: *Enzyme Kinetics
- Topic: Catalysts
- Replies: 8
- Views: 1061
Re: Catalysts
It increases the rate of both of these reactions equally and leaves the equilibrium constant unchanged.
- Fri Mar 15, 2019 1:39 am
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: Rate vs. Initial Rate
- Replies: 4
- Views: 755
Re: Rate vs. Initial Rate
Rate depends on concentrations at various points in the reaction, while initial rate depends on the initial concentrations of the reactants.
- Fri Mar 15, 2019 1:37 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Platinum in Cell Diagram
- Replies: 7
- Views: 1834
Re: Platinum in Cell Diagram
Platinum is an inert conductor added in order to conduct a charge. You add platinum when no other inert solids are able to perform conduction in the cell.
- Fri Mar 15, 2019 1:36 am
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: Porous Disk and Salt Bridge
- Replies: 13
- Views: 1164
Re: Porous Disk and Salt Bridge
They both serve the same purpose and thus have essentially no reasonable difference in this class.
- Fri Mar 15, 2019 1:36 am
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: Electroplating
- Replies: 2
- Views: 442
Re: Electroplating
Electroplating makes use of redox reactions. For example, when zinc plates iron and this zinc coat is scratched, iron borrows electrons from zinc to keep itself from being oxidized and thus preventing rusting.
- Fri Mar 15, 2019 1:31 am
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Nernst
- Replies: 14
- Views: 1179
Re: Nernst
Yes--after balancing the redox reaction and finding the intermediate electrons transferred, you use this number of electrons as 'n,' as they are the moles of electrons.
- Fri Mar 15, 2019 1:30 am
- Forum: General Rate Laws
- Topic: intermediate molecules
- Replies: 3
- Views: 490
Re: intermediate molecules
Intermediate molecules are not a part of the overall reaction, as they are produced and consumed in separate elementary steps of the reaction.
- Fri Mar 15, 2019 1:29 am
- Forum: Second Order Reactions
- Topic: 2nd order rates
- Replies: 6
- Views: 797
Re: 2nd order rates
Yes. In order to get overall order, you simply add the powers of the reactants--so, two reactants of first order will form a second order rate law for the overall reaction.
- Fri Mar 15, 2019 1:25 am
- Forum: Zero Order Reactions
- Topic: Zero Order Reactions
- Replies: 8
- Views: 1013
Re: Zero Order Reactions
Different order reactions have different numbers and sequences of steps to form the final product. They also have different powers in the rate law.
- Fri Mar 15, 2019 12:02 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: 7D.5 Seventh Edition
- Replies: 1
- Views: 235
7D.5 Seventh Edition
In question 7.D.5, the solution manual shows that .59 is subtracted. This does not fall into line with the equation ln(k1/k2)=eA/R(1/T1-1/T2). How did they get this value then?
- Sun Mar 03, 2019 10:48 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: van't hoff equation
- Replies: 6
- Views: 711
Re: van't hoff equation
You can convert ln(x/y) to ln(x)-ln(y). To obtain x or y, you simply take e and raise it to -x or -y, respectively.
- Sun Mar 03, 2019 10:47 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: TEST 2
- Replies: 3
- Views: 385
Re: TEST 2
The Van't Hoff equation, provided on the equation sheet, was necessary for this. That being said, I did another method where I calculated the K using the relation between E cell and gibbs free energy and got the same answer, but I do not believe that that was the way you were supposed to calculate t...
- Wed Feb 27, 2019 2:24 pm
- Forum: Balancing Redox Reactions
- Topic: 6.K.3 Part d
- Replies: 1
- Views: 134
6.K.3 Part d
For 6.K.3 part D, how do we know
- Wed Feb 27, 2019 10:37 am
- Forum: Balancing Redox Reactions
- Topic: Balancing Hydrogen
- Replies: 2
- Views: 256
Balancing Hydrogen
I understand that to balance oxygen, you add water to the side of the equation that is lacking in oxygen. However, how do you know whether to add hydroxide and water or hydrogen when balancing hydrogen in a redox reaction?
- Sun Feb 10, 2019 9:25 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: calculation of change in entropy
- Replies: 3
- Views: 387
Re: calculation of change in entropy
You assume that temperature is constant in one case and that volume is constant in the other, then you add the results of both of those equations.
- Sun Feb 10, 2019 9:24 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Midterm Next Week
- Replies: 6
- Views: 656
Re: Midterm Next Week
No, as mentioned the content covered only goes to the end of entropy.
- Sun Feb 10, 2019 9:22 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: General entropy question
- Replies: 9
- Views: 813
Re: General entropy question
Entropy is based on the amount of positions that an object can occupy. Therefore, gasses and complex molecules have the greatest entropies, while solids and simple molecules have lower entropies.
- Mon Jan 21, 2019 8:54 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Salt formation
- Replies: 3
- Views: 309
Re: Salt formation
Salts can be formed when an acid and base come together and are neutralized, forming water and a salt.
- Mon Jan 21, 2019 8:54 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Le Chatelier's Principle on Temperature
- Replies: 4
- Views: 489
Re: Le Chatelier's Principle on Temperature
Heat can be seen as part of the reaction, with an exothermic reaction having heat in the products and an endothermic reaction having heat in the reactants. Thus, lowering temperature for an exothermic reaction will cause the reaction to sit to the right.
- Mon Jan 21, 2019 8:52 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Percent Protonation
- Replies: 6
- Views: 508
Re: Percent Protonation
Percent protonation is the concentration of the conjugate acid over the initial concentration of the weak base multiplied by one hundred.
- Mon Jan 14, 2019 9:32 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: change in pressure
- Replies: 4
- Views: 416
Re: change in pressure
The reaction's direction shifts to balance out any changes made on the system. Accordingly, if there are more moles of products, the reaction will shift to favor the reactants when pressure is added in order to retain a balanced system.
- Mon Jan 14, 2019 9:27 pm
- Forum: Ideal Gases
- Topic: R in PV=nRT
- Replies: 34
- Views: 5861
Re: R in PV=nRT
R is a constant known as the gas constant. Its units are represented as Joules . mol^-1 and various other units such as atmospheres.
- Mon Jan 14, 2019 11:06 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Concentration Affecting K
- Replies: 7
- Views: 968
Re: Concentration Affecting K
No—K is based on the rate of the forward and reverse reactions, not the concentrations of the products and reactants. Changing concentration will simply cause an imbalance between products and reactants, but this imbalance will be undone as the reaction returns to equillibrium and the equillibrium r...
- Sat Dec 08, 2018 11:09 pm
- Forum: Bronsted Acids & Bases
- Topic: Base Strength
- Replies: 4
- Views: 1830
Re: Base Strength
BrOH is a strong base, and thus it will naturally be stronger than most other bases.
- Sat Dec 08, 2018 11:07 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: HOCl vs HOI
- Replies: 9
- Views: 4120
Re: HOCl vs HOI
HOCl's anion is more stable because chlorine is more electronegative and is more stable (via delocalization) than HOI.
- Sat Dec 08, 2018 11:05 pm
- Forum: Sigma & Pi Bonds
- Topic: Why are sigma bonds stronger than pi bonds?
- Replies: 10
- Views: 4618
Re: Why are sigma bonds stronger than pi bonds?
For one, sigma bonds go directly into one another and have a greater overlap, which makes it stronger than pi bonds, which must go outwards and then connect across a gap. Moreover, I believe interactions w/ multiple bonds are stronger because they have multiple bonds, not necessarily because they ha...
- Sat Dec 08, 2018 11:00 pm
- Forum: Naming
- Topic: cis and trans
- Replies: 4
- Views: 511
Re: cis and trans
Not for naming, but it is important to know that a cis isomer has elements on the same sides of the molecule while a trans isomer has elements on the opposite sides of a molecule.
- Sat Dec 08, 2018 10:58 pm
- Forum: Polyprotic Acids & Bases
- Topic: H2SO4 vs H2CO3
- Replies: 4
- Views: 4421
Re: H2SO4 vs H2CO3
Because HSO4- has sulfur, which has a greater electronegativity than carbon, the anion is more stable (Due to electron delocalization) and thus its acid is stronger.
- Sat Dec 08, 2018 10:56 pm
- Forum: Hybridization
- Topic: Hybridization on Test
- Replies: 3
- Views: 413
Re: Hybridization on Test
Yes--just because lone pairs are not written in a diagram does not always mean they are not there. As such, they must be accounted for in determining hybridization.
- Sat Dec 08, 2018 10:55 pm
- Forum: Dipole Moments
- Topic: London Dispersion
- Replies: 5
- Views: 945
Re: London Dispersion
Larger molecules with many electrons and a greater surface area can be capable of being stronger than dipole-dipole forces in limited cases.
- Sat Dec 08, 2018 10:38 pm
- Forum: Calculating the pH of Salt Solutions
- Topic: Salt Solution pH — 7th Edition 6.D.11
- Replies: 2
- Views: 372
Salt Solution pH — 7th Edition 6.D.11
In 6.D.11, we are supposed to identify the pH of the solution when dissolved in water. Part c is KF and has a pH greater than 7. Wouldn’t KF dissociate to form two conjugates of strong bases and acids and thus not affect the solution, leaving it at 7?
- Sat Dec 08, 2018 1:44 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Difference Between Polarizability and Polarizing Power
- Replies: 3
- Views: 5052
Re: Difference Between Polarizability and Polarizing Power
Polarizing power corresponds to cations, the most polarizing power being found in the smallest cations with he greatest positive charge. On the other hand, polarizability corresponds to anions. The anions with the greater polarizability are the biggest. Whats the relation between polarizability and...
- Sat Dec 08, 2018 12:51 pm
- Forum: Lewis Structures
- Topic: Drawing radicals
- Replies: 1
- Views: 322
Drawing radicals
When drawing radicals, how do we know which element receives the ‘odd’ number of electrons (i.e which element gets seven electrons instead of eight)?
- Sat Dec 08, 2018 11:51 am
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Rydberg’s Equation - Hydrogen
- Replies: 2
- Views: 421
Rydberg’s Equation - Hydrogen
Is the hydrogen atom the only atom with which we will need to use Rydberg’s equation? Also, what is the constant?
- Sat Dec 08, 2018 9:41 am
- Forum: Coordinate Covalent Bonds
- Topic: Chelates
- Replies: 4
- Views: 703
Re: Chelates
405112316 wrote:Chelates are basically complexes that have ligands that form a ring of atoms around the transition metal ion. When ligands bond at more than one tie, they are likely to form a chelate.
Solid--what's a tie?
- Fri Dec 07, 2018 11:06 pm
- Forum: Coordinate Covalent Bonds
- Topic: Chelates
- Replies: 4
- Views: 703
Chelates
I don't exactly understand what chelates are (Beyond definition) or what their implications are--can anybody help me out with this?
- Fri Dec 07, 2018 10:36 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Difference Between Polarizability and Polarizing Power
- Replies: 3
- Views: 5052
Difference Between Polarizability and Polarizing Power
What are the definitions of polarizability and polarizing power? What are the trends associated with cations and ions? What are the implications/what type of questions may we expect regarding such trends?
- Fri Dec 07, 2018 10:09 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: LDF
- Replies: 7
- Views: 1663
Re: LDF
All molecules contain LDF, but they can also contain additional molecular forces such as hydrogen and dipole-dipole.
- Fri Dec 07, 2018 10:07 pm
- Forum: Bond Lengths & Energies
- Topic: bond strength
- Replies: 3
- Views: 763
Re: bond strength
If other factors such as chemical structure and atoms are controlled for, yes, this is true.
- Fri Dec 07, 2018 10:05 pm
- Forum: Electronegativity
- Topic: Radius
- Replies: 13
- Views: 1558
Re: Radius
As you move down a column, more energy levels are added to an atom, causing increased distance between the nucleus and valence electrons. Due to electron shielding (the interference of inner energy shells in the interactions between outer energy shells and the nucleus), electronegativity decreases a...
- Fri Dec 07, 2018 9:58 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Degeneracy
- Replies: 4
- Views: 5196
Re: Degeneracy
As many answers have stated, degeneracy refers to the number of possible quantum states on an energy level. A question might ask something like, 'How many degenerate orbitals are there in the p orbital of a carbon atom at ground level?' In this case, there are two degenerate orbitals in the p orbita...
- Fri Dec 07, 2018 9:53 pm
- Forum: Properties of Light
- Topic: De Broglie's equation [ENDORSED]
- Replies: 7
- Views: 1144
Re: De Broglie's equation [ENDORSED]
Yes. De Broglie's equation is the equation that can be applied to objects w/ mass (Such as base balls and people) to determine their wavelength.
- Fri Dec 07, 2018 9:51 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Test #2 Question #2
- Replies: 3
- Views: 763
Re: Test #2 Question #2
The Heisenberg uncertainty equation goes as follows: (mass)x(Velocity)x(Uncertainty in position)>/=h/4pi Using the data from the problem, we can find that the cricket ball is travelling at .042 m/s (Using dimensional analysis). Its mass is given (We use kilograms for mass whenever planck's constant ...
- Fri Dec 07, 2018 9:42 pm
- Forum: Photoelectric Effect
- Topic: Work Function
- Replies: 14
- Views: 2171
Re: Work Function
The work function can be thought of as the amount of energy required to discharge an electron from a metal surface. As such, the energy of the incoming photon-the work function=the kinetic energy of the discharged electron. The work function is sometimes given, but it can also be algebraically deter...
- Thu Dec 06, 2018 11:44 pm
- Forum: Ionic & Covalent Bonds
- Topic: Most Ionic Bond (2.D.3 7th ed)
- Replies: 1
- Views: 203
Most Ionic Bond (2.D.3 7th ed)
The textbook states that out of BaBr2, BeBr2, and BBr3, BaBr2 is the most ionic bond. Aside from difference in electronegativity/charge, what indicates that BaBr2 is more ionic than BeBr2?
- Tue Dec 04, 2018 9:45 pm
- Forum: Naming
- Topic: Transition Metal Names
- Replies: 1
- Views: 233
Transition Metal Names
Why is cobalt sometimes ‘cobalt’ and other times ‘cobaltate’ ? Moreover, is there a general transition metals list that we can refer to?
- Tue Dec 04, 2018 9:37 pm
- Forum: Bronsted Acids & Bases
- Topic: 7th Edition 6C.21.b
- Replies: 1
- Views: 234
7th Edition 6C.21.b
The question is: Is acetic acid or formic acid stronger?
According to the textbook, formic acid is slightly stronger.
Why is this the case? I figured that since acetic acid has more atoms, it would be more stable if a hydrogen was taken away due to electron delocalization.
According to the textbook, formic acid is slightly stronger.
Why is this the case? I figured that since acetic acid has more atoms, it would be more stable if a hydrogen was taken away due to electron delocalization.
- Tue Dec 04, 2018 9:31 pm
- Forum: Amphoteric Compounds
- Topic: Amphoteric compounds
- Replies: 2
- Views: 302
Amphoteric compounds
Is there a set, defined way to find out if a substance is amphoteric?
- Tue Dec 04, 2018 6:03 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final Exam Questions
- Replies: 1
- Views: 2119
Final Exam Questions
Hi, the review session and exam locations upload states that the final will consist of questions from the homework and the online assessments. Can anybody confirm that this means that only focus questions, assigned homework, and the online assessments for audio-vidual focus topics will appear on the...
- Sun Dec 02, 2018 10:26 pm
- Forum: Lewis Acids & Bases
- Topic: acid names
- Replies: 8
- Views: 680
Re: acid names
I personally would memorize the more common acids and bases, especially if they appear on the homework.
- Sun Dec 02, 2018 10:25 pm
- Forum: Bronsted Acids & Bases
- Topic: Strong vs Weak Acid/Base Reactions
- Replies: 4
- Views: 413
Re: Strong vs Weak Acid/Base Reactions
Memorizing the different strong and weak acids and bases would be the best way to go about solving these types of problems.
- Sun Dec 02, 2018 10:24 pm
- Forum: Naming
- Topic: With Respect to the Final
- Replies: 9
- Views: 924
Re: With Respect to the Final
Given the fact that multiple homework questions necessitate the knowledge of both, it would make sense that you must know both for the final. After all, any one of those homework questions could appear on the final (The Final review session paper states that "Questions will come from the Homewo...
- Mon Nov 26, 2018 12:12 am
- Forum: Ionic & Covalent Bonds
- Topic: polar/nonpolar
- Replies: 3
- Views: 355
Re: polar/nonpolar
Polar molecules, or molecules with a larger dipole moment, have greater differences in electronegativity between atoms.
- Mon Nov 26, 2018 12:11 am
- Forum: Ionic & Covalent Bonds
- Topic: Intra vs Intermolecular forces
- Replies: 9
- Views: 16458
Re: Intra vs Intermolecular forces
Since intermolecular forces are (far) weaker than intramolecular forces, they are easier to break.
- Mon Nov 26, 2018 12:09 am
- Forum: Bond Lengths & Energies
- Topic: How to Measure Bond Lengths
- Replies: 4
- Views: 520
Re: How to Measure Bond Lengths
You do not need to know the exact bond lengths, but you do need to know general trends that vary across different types of bonds. Exact bond lengths will be given if they are necessary, if I’m not mistaken.
- Sun Nov 18, 2018 11:12 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: hydrogen bonding
- Replies: 11
- Views: 944
Re: hydrogen bonding
Hydrogen bonding is extremely strong. Because of this, it takes more heat to break hydrogen bonds, leading to higher melting points among hydrogen bonds.
- Sun Nov 18, 2018 11:05 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: H-Bonding
- Replies: 8
- Views: 2223
Re: H-Bonding
No. Typically, bonds between hydrogen and nitrogen, oxygen, and fluorine are hydrogen bonds.
- Sun Nov 18, 2018 11:04 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Intermolecular Forces
- Replies: 7
- Views: 1359
Re: Intermolecular Forces
Determinant factors include strength, molecular size, and electronegativity. London forces are usually weaker. Smaller molecules are primarily dipole-dipole, while the inverse is true for London forces. Greater differences in electronegativity typically indicate dipole-dipole forces.
- Sun Oct 28, 2018 9:30 pm
- Forum: Trends in The Periodic Table
- Topic: Electron Affinity Trend
- Replies: 9
- Views: 1073
Re: Electron Affinity Trend
Since electrons in the top right corner of the periodic table are closest to attaining eight valence electrons, they release more energy in order to receive that eighth electron and fill their outer shell.
- Sun Oct 28, 2018 9:28 pm
- Forum: Trends in The Periodic Table
- Topic: Atomic Radius
- Replies: 7
- Views: 672
Re: Atomic Radius
When an electron is removed, the proton:electron ratio heightens. Because of this, the surrounding electrons become more attracted to the protons in the nucleus, requiring more energy to remove said electrons and thus a higher ionization energy.
- Sun Oct 28, 2018 9:26 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student [ENDORSED]
- Replies: 297
- Views: 382952
Re: Advice from a Medical Student [ENDORSED]
From a premed who has been adjusting to UCLA's curriculum--thank you sm for this post and the advice!
- Sun Oct 21, 2018 11:52 pm
- Forum: Properties of Electrons
- Topic: Test question
- Replies: 6
- Views: 595
Re: Test question
As it wasn't covered in lecture, I don't believe so.
- Sun Oct 21, 2018 11:49 pm
- Forum: *Black Body Radiation
- Topic: Test
- Replies: 9
- Views: 1248
Re: Test
I don't believe so. Dr. Lavelle mentioned it but explicitly said it was not something we'd need to understand in class, so I don't believe it will be on the test.
- Sun Oct 21, 2018 11:43 pm
- Forum: Properties of Light
- Topic: Test 2 Equations
- Replies: 14
- Views: 1034
Re: Test 2 Equations
I think that most equations will be on the cover sheet of the test, but equations that are specifically tied to content in 'The Quantum World' that we are supposed to memorize and/or derive are not.