Search found 89 matches
- Sat Mar 16, 2019 7:28 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Entropy
- Replies: 3
- Views: 665
Re: Entropy
but when? Is it when an irreversible expansion is occurring that DeltaSTotal=0?
- Fri Mar 15, 2019 10:25 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Entropy
- Replies: 3
- Views: 665
Entropy
When is Stotal=0 and Ssurr=-Ssys?
- Fri Mar 15, 2019 1:51 am
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: DeltaS Total
- Replies: 2
- Views: 556
DeltaS Total
When does DeltaS Total=0, so Ssurr=-Ssys?
- Fri Mar 15, 2019 12:09 am
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Pseudo 1st order reaction
- Replies: 2
- Views: 350
Re: Pseudo 1st order reaction
okay, thank you! is there a homework problem like this?
- Thu Mar 14, 2019 11:46 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Solving for Arrhenius Equation
- Replies: 2
- Views: 300
Solving for Arrhenius Equation
In solving for k in the Arrhenius equation k=Ae^-Ea/RT, my value always equals less than one when the answer key says it should be 6 x 10^8 for 6th edition 15.67? How does one solve this on the calculator?
- Thu Mar 14, 2019 9:55 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Pseudo 1st order reaction
- Replies: 2
- Views: 350
Pseudo 1st order reaction
What is a pseudo first order reaction and what homework problem is it used in?
- Thu Mar 14, 2019 9:20 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Arrhenius Equation Variations
- Replies: 1
- Views: 452
Arrhenius Equation Variations
Is the equation ln(k2/K1)= Ea/R(1-T1-(1-T2) a variation of the Arrhenius equation?
- Thu Mar 14, 2019 9:00 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Pre-Equilibrium Approach
- Replies: 3
- Views: 302
Re: Pre-Equilibrium Approach
Also in 15.89 for the 6th edition book.
- Wed Mar 13, 2019 11:21 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Kinetic Energy
- Replies: 1
- Views: 231
Kinetic Energy
Can someone explain how mechanisms can be distinguished using kinetic data/energy?
- Wed Mar 13, 2019 10:53 pm
- Forum: First Order Reactions
- Topic: Time Conversions
- Replies: 9
- Views: 1069
Re: Time Conversions
if your k is in min^-1 and your t is in seconds then what do you do?
- Wed Mar 13, 2019 9:22 pm
- Forum: First Order Reactions
- Topic: Time Conversions
- Replies: 9
- Views: 1069
Time Conversions
For [A]=[A]oe^-kt, there seems to always be conversions associated with the -kt and time, do you convert the k or the t to equal the same units (minutes, seconds, hours) as one another?
- Wed Mar 13, 2019 9:20 pm
- Forum: First Order Reactions
- Topic: Integrated Rate Law
- Replies: 2
- Views: 311
Integrated Rate Law
How do you know whether to use the exponential decay 1st rate law or the regular integrated rate law? For example, in the 6th edition 15.25.
- Wed Mar 13, 2019 8:41 pm
- Forum: First Order Reactions
- Topic: Integrated Rate Law
- Replies: 1
- Views: 256
Integrated Rate Law
How do you know whether to use the exponential decay 1st rate law or the regular integrated rate law? For example, in the 6th edition 15.25.
- Tue Mar 12, 2019 11:51 pm
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: Flow of electrons
- Replies: 4
- Views: 751
Flow of electrons
When is the flow of electrons NOT from anode to cathode? In 6th edition 14.91 it flows from cathode to anode?
- Fri Mar 08, 2019 2:43 pm
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: Rate Order Graphs
- Replies: 3
- Views: 439
Re: Rate Order Graphs
look at what the x-axis and y-axis are and if its linear, its likely that order. For example, ln[A] vs. t if thats linear, its likely 1st order. If you search on Google there are super helpful charts that break down 1st, 2nd, and zero order in terms of linear plot to determine the rate order and the...
- Fri Mar 08, 2019 2:36 pm
- Forum: Zero Order Reactions
- Topic: Determining Rate Orders
- Replies: 3
- Views: 388
Re: Determining Rate Orders
You look at when one reactant changes and the other doesn't or stays the same (lets say the one reactant doubles). Then, you compare this to the corresponding reaction rate and if that changes (lets say it doubles for instance). So, you will be left with 2^x (2 raised to the X equals the rate)=2 (ra...
- Fri Mar 08, 2019 2:29 pm
- Forum: Zero Order Reactions
- Topic: Enzymatic Reactions
- Replies: 2
- Views: 309
Enzymatic Reactions
Can someone explain why enzymatic/catalytic reactions are considered zero order?
- Fri Mar 08, 2019 2:29 pm
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: Definition of 1st, 2nd, and zero order
- Replies: 1
- Views: 243
Definition of 1st, 2nd, and zero order
What do the definitions conceptually of the order of the reactions mean? Does the reaction rate increase from 0-->2nd order?
- Thu Feb 28, 2019 11:29 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: finding DeltaG
- Replies: 6
- Views: 643
Re: finding DeltaG
G=-nFE
G=H-TS
G=-RTlnK
G=-RTlnK + RTlnQ
etc.
You can combine these and switch out variables but it depends what you are given.
G=H-TS
G=-RTlnK
G=-RTlnK + RTlnQ
etc.
You can combine these and switch out variables but it depends what you are given.
- Thu Feb 28, 2019 11:25 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Diagrams
- Replies: 3
- Views: 412
Re: Cell Diagrams
A lot of times Ag(s) and Ni(s) will be used as electrodes too.
- Thu Feb 28, 2019 11:24 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: H+ in cell diagrams
- Replies: 5
- Views: 583
Re: H+ in cell diagrams
H+ and OH- both being aqueous are used in the cell diagram!
Water is NOT used
Water is NOT used
- Thu Feb 28, 2019 11:23 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Finding n for Galvanic Cell Equations
- Replies: 2
- Views: 293
Re: Finding n for Galvanic Cell Equations
Yes, you must make sure the coefficients and amount of R and P is balances as well as the charge
- Thu Feb 28, 2019 12:12 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Test #2
- Replies: 1
- Views: 244
Test #2
In the 6th edition, what is the last problem that will be on the exam (before Nernst questions)?
- Thu Feb 28, 2019 12:06 am
- Forum: Balancing Redox Reactions
- Topic: Oxidation Numbers
- Replies: 3
- Views: 1304
Oxidation Numbers
How do we know which elements have an oxidation number of 0 like O2 and Cl2? Is there a trick to knowing which elements have an oxidation state of 0?
- Wed Feb 27, 2019 9:56 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Flow of electrons
- Replies: 4
- Views: 450
Re: Flow of electrons
do electrons also flow from anode to cathode in electrolytic cells?
- Wed Feb 27, 2019 9:52 pm
- Forum: Balancing Redox Reactions
- Topic: Basic Solutions
- Replies: 5
- Views: 446
Re: Basic Solutions
In the textbook they give examples how to balance acidic and basic solutions within the electrochemistry chapter
- Wed Feb 27, 2019 9:50 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student [ENDORSED]
- Replies: 297
- Views: 381997
Re: Advice from a Medical Student [ENDORSED]
MCAT covers 14A-->D as well as biochemistry
- Wed Feb 27, 2019 9:49 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Diagram
- Replies: 2
- Views: 269
Cell Diagram
When writing cell diagrams, how do you know which goes closest to the electrode and which is closest to the salt bridge? For instance, when you have two things separated by a comma like Fe3+ and Fe2+, which one is closest to electrode when drawing cell diagrams?
- Tue Feb 26, 2019 11:51 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: E^o(cell) vs. Ecell
- Replies: 6
- Views: 13026
E^o(cell) vs. Ecell
Whats the difference between the two?
- Thu Feb 21, 2019 1:55 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Flow of electrons
- Replies: 4
- Views: 450
Flow of electrons
Do electrons always flow from anode to cathode?
- Thu Feb 21, 2019 1:52 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Galvanic/Voltaic Cells
- Replies: 4
- Views: 541
Re: Galvanic/Voltaic Cells
They are synonymous, however, once we get to it there is a difference between galvanic and electrolytic
- Thu Feb 21, 2019 1:51 pm
- Forum: Balancing Redox Reactions
- Topic: Oxidation States
- Replies: 10
- Views: 962
Oxidation States
As stated in Lecture, Mn has a +7 charge- is their a table we should memorize in order to determine oxidation states?
- Tue Feb 12, 2019 2:33 am
- Forum: Phase Changes & Related Calculations
- Topic: Specific Heat of Ice
- Replies: 3
- Views: 2864
Specific Heat of Ice
When do you use specific heat capacity of ice (2.03)? I have seen with problems in terms of ice melting in water we use the specific heat of water (4.184). Therefore, when do we use the ice specific heat?
- Tue Feb 12, 2019 2:23 am
- Forum: Administrative Questions and Class Announcements
- Topic: DOWNLOAD SESSION WORKSHEETS HERE - Sun 7-9PM (Karen)
- Replies: 179
- Views: 22754
Re: DOWNLOAD SESSION WORKSHEETS HERE - Sun 7-9PM (Karen)
for question 8, isn't the answer going to be Kb x 3^8?
- Tue Feb 12, 2019 1:31 am
- Forum: Administrative Questions and Class Announcements
- Topic: Lyndon's HOTDOG MIDTERM REVIEW SESSION!! FINALLY!
- Replies: 49
- Views: 11436
Re: Lyndon's HOTDOG MIDTERM REVIEW SESSION!! FINALLY!
For #6, how did we get w=9.119 x 10^3 J?
- Mon Feb 11, 2019 11:45 pm
- Forum: Phase Changes & Related Calculations
- Topic: Lyndon MIdterm question
- Replies: 1
- Views: 162
Lyndon MIdterm question
Could someone please post the worked out answers to questions 3A and B please from the Lyndon review, thank you!
- Mon Feb 11, 2019 1:53 am
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Isothermal
- Replies: 1
- Views: 241
Isothermal
In isothermal reactions, internal energy is always equal to 0 so -q=w?
- Sun Feb 10, 2019 7:01 pm
- Forum: Phase Changes & Related Calculations
- Topic: Phase change equation
- Replies: 1
- Views: 218
Phase change equation
For 6th edition 8.85 or a phase change in general, do you use q=nDeltaH or deltaH=nDeltaH because for this phase change it uses deltaH=n x deltaHfus?
- Sun Feb 10, 2019 6:53 pm
- Forum: Phase Changes & Related Calculations
- Topic: heat units
- Replies: 3
- Views: 396
heat units
Using the equation q=nCdelta T where n is in g, C is in J/Cg and Temperature is in Celsius, isn't the heat unit supposed to be J and NOT kj?
- Sat Feb 09, 2019 11:03 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Calorimeters
- Replies: 2
- Views: 279
Calorimeters
For 8.23, why do we ignore the number of moles in q=nCdeltaT?
- Fri Feb 08, 2019 12:04 am
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Degeneracy
- Replies: 1
- Views: 234
Degeneracy
Can someone explain exactly what degeneracy means? And how to calculate it?
- Fri Feb 08, 2019 12:02 am
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm
- Replies: 2
- Views: 379
Re: Midterm
Most Likely not but knowing how to derive it is important in understanding the concepts and how the variables connect to one another
- Fri Feb 08, 2019 12:01 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Internal energy
- Replies: 1
- Views: 300
Internal energy
How do you know determine if internal energy equals 0?
- Thu Jan 31, 2019 2:42 pm
- Forum: Calculating Work of Expansion
- Topic: Change in internal energy
- Replies: 3
- Views: 321
Re: Change in internal energy
Have we even went over internal energy in class yet (Delta U)?
- Thu Jan 31, 2019 2:39 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Work Question
- Replies: 4
- Views: 450
Re: Work Question
To add, I think of Work being the ability to do something. For example, if the piston is moving out, that means the gas (system) is doing work because it is physically pushing the piston out of place.
- Tue Jan 29, 2019 2:21 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Enthalpy
- Replies: 4
- Views: 359
Re: Enthalpy
Wait you said enthalpy of reaction for both, which one is which again?
- Tue Jan 29, 2019 2:20 pm
- Forum: Phase Changes & Related Calculations
- Topic: Test #1
- Replies: 11
- Views: 909
Test #1
Do we get our Test #1 back in discussion section this week?
- Tue Jan 29, 2019 12:49 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Method #3
- Replies: 2
- Views: 360
Method #3
I am enrolled in the 11am lecture, but on Monday I had to go to the 1pm and we didn't finish covering Method #3 on Friday in the 11am, could explain explain this one to me and maybe send a picture of the notes from lecture? Thanks!
- Tue Jan 29, 2019 12:48 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Cp vs. Csp
- Replies: 2
- Views: 479
Cp vs. Csp
How do you know which one to use and what is the difference between them?
- Tue Jan 29, 2019 12:45 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Enthalpy
- Replies: 4
- Views: 359
Enthalpy
What is the difference between the Enthalpy of Reaction and the Enthalpy of Formation?
- Thu Jan 24, 2019 11:27 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Test 1
- Replies: 9
- Views: 717
Re: Test 1
to correct the equation above pOH +pH=14 NOT pkw
- Thu Jan 24, 2019 11:11 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 5%
- Replies: 10
- Views: 743
Re: 5%
So basically the "x" you calculate needs to be within 5% of the initial concentration so do x/initial x 100%
- Thu Jan 24, 2019 11:09 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: pKa and pH
- Replies: 2
- Views: 311
Re: pKa and pH
No, pka=-log Ka and pH=-log(H30+) so the equations both involve a negative log (the "p" signals a negative log) Basically they are related but the pH tells you the amount of H atoms in a solution and the pka is more specific in letting us know how acidic something is (the lower the pka the...
- Thu Jan 24, 2019 12:27 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Salts
- Replies: 1
- Views: 137
Salts
Within the 6th edition, which problems start with using salts?
- Wed Jan 23, 2019 10:40 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Strong Acids and Bases
- Replies: 3
- Views: 369
Strong Acids and Bases
Since strong acids and bases completely dissociate in a reaction, we do NOT need to do an ICE table and therefore we just need to look at the moles of OH or H30 on the product side and multiple that by the initial conc of the acid or base?
- Wed Jan 23, 2019 10:23 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Specific Notation
- Replies: 5
- Views: 575
Re: Specific Notation
pay attention if the problem gives you Kc or Kp, then you know which to use!
- Tue Jan 22, 2019 6:09 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Salts
- Replies: 4
- Views: 477
Salts
How do you know when something is a salt? To add, how does a salt affect the ICE Tables because in lecture the product sides were NOT at 0??
- Tue Jan 22, 2019 6:07 pm
- Forum: Ideal Gases
- Topic: Outline 1 Bullet
- Replies: 2
- Views: 238
Re: Outline 1 Bullet
Lavelle mentioned if you are rusty on ideal gases to read up on them in the book! The textbook explains ideal gases well in the concepts of chemical equilibrium.
- Tue Jan 22, 2019 6:01 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Quiz #1 This friday
- Replies: 5
- Views: 654
Quiz #1 This friday
I was wondering what the best way was to prepare for the quiz this week? To add, what is the format of the quiz and the quiz will be during discussion sections correct?
- Tue Jan 15, 2019 2:16 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE Tables [ENDORSED]
- Replies: 11
- Views: 2344
ICE Tables [ENDORSED]
How do you know when to use an ICE Table? Is it ALWAYS the case that the products start at 0?
- Mon Jan 14, 2019 6:59 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Changes in pressure
- Replies: 2
- Views: 250
Changes in pressure
According to 11.69, an increase in pressure of the product causes the partial pressure of a reactant to decrease. How is this? Is there a general rule in predicting how pressure influences the changes in equilibria
- Mon Jan 14, 2019 5:55 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Solids and Liquids in K
- Replies: 4
- Views: 417
Re: Solids and Liquids in K
^as mentioned above, pure solids and liquids are not involved in any K expression. HOWEVER, H20 in aqueous or gas form is used in equilibrium expressions (refer to the first 10 problems in Homework in chapter 11)
- Thu Jan 10, 2019 6:05 pm
- Forum: Ideal Gases
- Topic: Temperature Units
- Replies: 4
- Views: 149
Re: Temperature Units
Even though gases use STP at 273K it will primarily depend on the question? Or you just have to know if you're given gases to use 273K?
- Thu Jan 10, 2019 6:03 pm
- Forum: Ideal Gases
- Topic: units for PV=nRT
- Replies: 5
- Views: 611
Re: units for PV=nRT
R is the universal gas constant that can be in many different variations in terms of units. However, for this class, I believe we will be primarily focusing on R= 8.3145 J/mol·K since T in PV=nRT will be in Kelvin as Dr. Lavelle stated in class. Hope this helps!
- Thu Jan 10, 2019 5:57 pm
- Forum: Ideal Gases
- Topic: Temperature Units
- Replies: 4
- Views: 149
Temperature Units
How do you know whether to use K=273 K (STP) or K=298 K when calculating PV=nRT?
- Thu Jan 10, 2019 5:51 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Partial Pressures Definition
- Replies: 2
- Views: 226
Partial Pressures Definition
Can someone give the definition of partial pressures and why its important to use partial pressures for gases and concentration for everything else?
- Thu Mar 10, 2016 6:15 pm
- Forum: *Carboxylic Acids
- Topic: Organic Naming
- Replies: 1
- Views: 1299
Organic Naming
For organic naming with functional groups. Ether is the one one that is named in the beginning of the molecule?
- Wed Mar 02, 2016 1:51 am
- Forum: *Free Energy of Activation vs Activation Energy
- Topic: Temp. and Activation Energy
- Replies: 1
- Views: 476
Temp. and Activation Energy
Whats the relationship between Temperature and Activation Energy? If one decreases what happens to the other? If one increases what happens to the other?
- Mon Feb 29, 2016 8:34 pm
- Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
- Topic: Cis/Trans
- Replies: 3
- Views: 857
Cis/Trans
Can someone explain the main differences between a cis and trans isomer? How could you tell looking at a molecule whether it is one or the other?
- Thu Feb 25, 2016 5:28 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Finding K
- Replies: 2
- Views: 505
Finding K
When given the K of the reverse reaction and concentrations of the forward. How do you find the overall K? Also, how do you know whether the reaction is favoring the products or the reactants?
- Thu Feb 25, 2016 5:25 pm
- Forum: *Alkanes
- Topic: Nucleophiles
- Replies: 1
- Views: 420
Nucleophiles
What makes a molecule a more ambident nucleophile?
- Fri Feb 19, 2016 6:40 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: Formal Charges
- Replies: 2
- Views: 564
Re: Formal Charges
I believe you would use formal charge to find out if it becomes positive or negatively charged.
- Fri Feb 19, 2016 6:37 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Reverse reactions
- Replies: 1
- Views: 447
Reverse reactions
If given concentrations of a reaction, and the balanced reaction. How do you find K and if the reaction is going forward or reverse?
- Tue Feb 09, 2016 2:18 pm
- Forum: Calculating Work of Expansion
- Topic: Calc heat functions
- Replies: 1
- Views: 402
Calc heat functions
When do you know when to use q=-q, mcdeltaT=-mcdeltaT, or q=ndeltaH + mcdeltaT????
- Wed Feb 03, 2016 10:06 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Redox reactions
- Replies: 2
- Views: 679
Redox reactions
How do you determine if a redox reaction is favorable?
- Mon Jan 25, 2016 7:39 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Enthalpy, internal energy, and entropy equations
- Replies: 1
- Views: 488
Enthalpy, internal energy, and entropy equations
What equations do we need to know for the quiz this week that aren't on the equations sheet given? In other words, what concepts do we fully need to understand that will not be given on the sheet?
- Tue Jan 19, 2016 11:42 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Calorimeters Example
- Replies: 1
- Views: 294
Calorimeters Example
Can someone go over the difference between the two calorimeters that Lavelle explained in class?
- Fri Jan 15, 2016 7:46 pm
- Forum: Calculating Work of Expansion
- Topic: Integrals
- Replies: 2
- Views: 645
Integrals
For calculating the work of expansion how do you properly solve an integral? I haven't had CALC in awhile and I forgot how to mathematically solve it.
- Fri Jan 08, 2016 10:31 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Heat Capacity and Specific Heat
- Replies: 1
- Views: 307
Heat Capacity and Specific Heat
I know we went over these two topics in lecture today, but how exactly do these to correlate with enthalpy? In other words, what does specific heat and heat capacity tell us?
- Mon Nov 30, 2015 8:59 pm
- Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
- Topic: Salts in Solutions
- Replies: 2
- Views: 507
Salts in Solutions
How can you decipher what salts are involved in a certain reaction? Like how can you determine the outcomes or products within a buffer?
- Mon Nov 16, 2015 10:21 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE BOX
- Replies: 1
- Views: 445
ICE BOX
Is there a proper way to finding the C part in the ICE box. I always get confused when trying to find this part.
- Sun Nov 15, 2015 11:05 pm
- Forum: Naming
- Topic: Naming Coordination Compounds
- Replies: 1
- Views: 434
Naming Coordination Compounds
Can somebody give a list of steps in naming coordination compounds? How do you know the oxidation numbers for each metal ion?
- Tue Nov 03, 2015 3:16 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Molecular orbital theory
- Replies: 1
- Views: 511
Molecular orbital theory
If you are given CO and you are told to do the molecular orbital theory for it, do you do the one where Z>8 or Z<8???
- Fri Oct 30, 2015 6:16 pm
- Forum: Hybridization
- Topic: How to Determine Electron Density
- Replies: 4
- Views: 3767
How to Determine Electron Density
How do you calculate the number of electron density regions?
- Mon Oct 26, 2015 4:05 pm
- Forum: Lewis Structures
- Topic: Lone Pairs
- Replies: 1
- Views: 339
Lone Pairs
When doing a Lewis Structure, how do you know if an element has a lone pair or more than one lone pair?
- Thu Oct 22, 2015 8:12 pm
- Forum: Lewis Structures
- Topic: Bonds
- Replies: 2
- Views: 832
Bonds
When making a Lewis Structure, how do you know whether to put a single, double, or triple bond? I know you look at the valence electrons but I get confused when deciding how many dots are around the element
- Wed Oct 14, 2015 9:07 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Finding Quantum Numbers
- Replies: 2
- Views: 760
Finding Quantum Numbers
How do you know what the m(l) quantum number for an element is?
- Tue Oct 06, 2015 5:33 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Elements with +2 charge
- Replies: 1
- Views: 569
Elements with +2 charge
In the review problems for E:23,
How do you calculate the amount (in moles) Cu^2+ ions in 3.00 g of CuBr2?
How do you calculate the amount (in moles) Cu^2+ ions in 3.00 g of CuBr2?
- Fri Oct 02, 2015 12:27 pm
- Forum: Properties of Light
- Topic: Question: Wave Model vs. Photon Model of Light
- Replies: 7
- Views: 3502
Re: Question: Wave Model vs. Photon Model of Light
I believe that the photon model of light showed that light has both wave and particle properties. Thus, this model shows that because it is specifically about the photon of light hitting the medal which emits an electron. I hope this helps!