Search found 76 matches
- Sun Mar 10, 2019 8:56 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Formulas
- Replies: 6
- Views: 650
Re: Formulas
I think its just depends on what is given and known.
- Sun Mar 10, 2019 8:54 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Approximation
- Replies: 7
- Views: 1286
Re: Approximation
yeah i have the same question, if we dont round will it be considered wrong?
- Sun Mar 10, 2019 8:51 pm
- Forum: Second Order Reactions
- Topic: Equations
- Replies: 2
- Views: 1795
Re: Equations
Just the final forms and what they are used for.
- Sun Mar 10, 2019 8:50 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: Instantaneous vs Average
- Replies: 11
- Views: 1058
Re: Instantaneous vs Average
Average rate is the change over time while the instantaneous rate is the rate at a specific moment found when taking the derivative.
- Sun Mar 10, 2019 8:49 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Final Material
- Replies: 4
- Views: 499
Re: Final Material
Do you know what homework questions were the ones he put on the exam?
- Sun Mar 03, 2019 3:43 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Gibbs Free Energy and Entropy
- Replies: 6
- Views: 958
Re: Gibbs Free Energy and Entropy
No in that case its dependent on the Temp, enthalpy and entropy so it can be + or -.
- Sun Mar 03, 2019 3:41 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Large K value
- Replies: 5
- Views: 589
Re: Large K value
It means that it is strongly favorable.
- Sun Mar 03, 2019 3:40 pm
- Forum: Zero Order Reactions
- Topic: Units of k in Zero Order Reactions
- Replies: 4
- Views: 496
Re: Units of k in Zero Order Reactions
I believe its M/S
- Sun Mar 03, 2019 3:39 pm
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: Determine n
- Replies: 3
- Views: 444
Re: Determine n
Yeah you have to be a bit more specific as to which one you are talking about.
- Sat Feb 23, 2019 9:04 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Homework
- Replies: 3
- Views: 386
Re: Homework
Always even when there are tests.
- Sat Feb 23, 2019 9:03 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Gibbs Free Energy and Pressure and K
- Replies: 2
- Views: 341
Re: Gibbs Free Energy and Pressure and K
Yeah same i dont think that has really been discussed in lecture yet.
- Sat Feb 23, 2019 9:02 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Test 3
- Replies: 14
- Views: 2346
Re: Test 3
Do you guys know what sections of the homework to focus on for this exam?
- Sat Feb 23, 2019 8:44 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: test 3
- Replies: 10
- Views: 1001
Re: test 3
By any chance do you guys know what sections of the homework does Exam 2 include?
- Sun Feb 17, 2019 4:52 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Work done vs work on system
- Replies: 18
- Views: 3912
Re: Work done vs work on system
"on" the system its positive and "by" the system its negative
- Sun Feb 17, 2019 4:50 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: constant C
- Replies: 7
- Views: 1070
Re: constant C
C is the specific heat and it can be calculated to find the specific heat of pressure or volume
- Sun Feb 17, 2019 4:49 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Gibbs and Enthalpy
- Replies: 4
- Views: 532
Re: Gibbs and Enthalpy
Gibbs free energy is energy that can be used as work
- Sun Feb 17, 2019 4:46 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Midterm Grades
- Replies: 35
- Views: 2787
Re: Midterm Grades
Usually its given after class not in discussion section.
- Sun Feb 10, 2019 10:42 am
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Negative q
- Replies: 7
- Views: 2783
Re: Negative q
it means its exothermic and heat is being released from the reaction
- Sun Feb 10, 2019 10:41 am
- Forum: Calculating Work of Expansion
- Topic: Gas Constant
- Replies: 3
- Views: 449
Re: Gas Constant
from the examples i have seen done they usually use that one so i dont think they will switch it up on us.
- Sun Feb 10, 2019 10:38 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Midterm [ENDORSED]
- Replies: 49
- Views: 4904
Re: Midterm [ENDORSED]
Do you guys know if the TAs or UAs are going to have some type of midterm review.
- Sun Feb 10, 2019 10:36 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Equations
- Replies: 5
- Views: 687
Re: Equations
Yeah thats the same problem i have, Im not sure where to use what because some are so closely related.
- Sun Feb 03, 2019 1:27 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Registering/Creating Your Chemistry Community Account
- Replies: 40
- Views: 101102
Re: Registering/Creating Your Chemistry Community Account
Im not sure but you should ask your TA.
- Sun Feb 03, 2019 1:25 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: S and pressure
- Replies: 3
- Views: 709
Re: S and pressure
it should increase, +.
- Sun Feb 03, 2019 1:23 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Adiabatic
- Replies: 4
- Views: 500
Re: Adiabatic
also heat is not allowed to enter or leave the system
- Sun Feb 03, 2019 1:19 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: kJ vs J
- Replies: 9
- Views: 832
Re: kJ vs J
1 kj = 1000j but you can use which ever
- Sun Feb 03, 2019 1:16 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Specific Heat (Csp)
- Replies: 3
- Views: 971
Re: Specific Heat (Csp)
It will most likely be given but its safe to know how to approach the question when its not.
- Tue Jan 29, 2019 12:38 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Cv versus Cp
- Replies: 4
- Views: 498
Re: Cv versus Cp
yeah its always true not just for the example
- Tue Jan 29, 2019 12:38 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: lecture notes
- Replies: 1
- Views: 280
Re: lecture notes
maybe the TA's?
- Tue Jan 29, 2019 12:37 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: 4A.1
- Replies: 2
- Views: 228
Re: 4A.1
the manual says its a closed system. i dont know why they put it like that in the book though.
- Tue Jan 29, 2019 12:35 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Enthalpy equations
- Replies: 2
- Views: 229
Re: Enthalpy equations
No i dont think so because he didnt mention it
- Tue Jan 29, 2019 12:34 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Calorimetry
- Replies: 5
- Views: 562
Re: Calorimetry
yeah the bomb calorimeters keeps a constant volume while the other keeps constant pressure. he might do examples on it
- Tue Jan 22, 2019 8:55 am
- Forum: Ideal Gases
- Topic: ICE table
- Replies: 5
- Views: 757
Re: ICE table
Our TA said something about learning to write it in bar but i dont think its required to do so. maybe that is just easier for some people
- Tue Jan 22, 2019 8:54 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: ignoring x
- Replies: 10
- Views: 899
Re: ignoring x
we ignore it when its = to or less than 10^3 because its a really small number that wont make a big difference to the answer
- Tue Jan 22, 2019 8:52 am
- Forum: Administrative Questions and Class Announcements
- Topic: Discussion Section Test
- Replies: 4
- Views: 487
Re: Discussion Section Test
Usually these isnt really any MC unless its a concept that he wanted us to remember from lecture, but the ones worth more and that take up like 90% of the test is the short answers.
- Tue Jan 22, 2019 8:49 am
- Forum: Administrative Questions and Class Announcements
- Topic: Number of questions on test one [ENDORSED]
- Replies: 39
- Views: 21709
Re: Number of questions on test one [ENDORSED]
if its similar to 14A then its usually 8 questions (some with sub parts) for 40 min
- Tue Jan 22, 2019 8:47 am
- Forum: Phase Changes & Related Calculations
- Topic: Endothermic or Exothermic
- Replies: 20
- Views: 2051
Re: Endothermic or Exothermic
Exothermic because heat is being released
- Sun Jan 13, 2019 5:00 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: True or False regarding reaction mixture [ENDORSED]
- Replies: 10
- Views: 805
Re: True or False regarding reaction mixture [ENDORSED]
yeah thats correct
- Sun Jan 13, 2019 4:59 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: equations
- Replies: 10
- Views: 748
Re: equations
usually reactants are on the left and products on the write and when its not given to us straight forward we first have to figure out what the chemical equation is.
- Sun Jan 13, 2019 4:56 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Equations
- Replies: 6
- Views: 523
Re: Equations
Kc- concentration and Kp- partial pressure
- Sun Jan 13, 2019 4:54 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Equilibrium Criteria
- Replies: 4
- Views: 353
Re: Equilibrium Criteria
Q and K have to equal each other, then its at equilibrium.
- Sat Dec 08, 2018 9:12 pm
- Forum: Student Social/Study Group
- Topic: Studying for tests/midterm
- Replies: 18
- Views: 2796
Re: Studying for tests/midterm
which videos do you find most helpful?
- Sat Dec 08, 2018 9:10 pm
- Forum: Student Social/Study Group
- Topic: Structure of the final
- Replies: 4
- Views: 875
Re: Structure of the final
Should be of similar structure to the midterm, just with everything included
- Sat Dec 08, 2018 9:09 pm
- Forum: Student Social/Study Group
- Topic: Practice Final
- Replies: 2
- Views: 807
Re: Practice Final
i think that was the only one made
- Sun Dec 02, 2018 2:34 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Tutoring? [ENDORSED]
- Replies: 121
- Views: 269320
Re: Tutoring? [ENDORSED]
In sessions who does the questions step by step even if they seem obvious?
- Sun Dec 02, 2018 2:33 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Strength of an acid
- Replies: 14
- Views: 1697
Re: Strength of an acid
Across a row in periodic table, acidity increases with the increase in electronegativity.
- Sun Dec 02, 2018 2:31 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Acid vs base [ENDORSED]
- Replies: 15
- Views: 1566
Re: Acid vs base [ENDORSED]
Lewis acid accepts electrons and Lewis base donates electrons.
- Sun Dec 02, 2018 2:27 pm
- Forum: Student Social/Study Group
- Topic: Chemistry News
- Replies: 135
- Views: 168869
Re: Chemistry News
does anyone know is there is gonna be a study guide?
- Sat Nov 24, 2018 12:25 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: on test? [ENDORSED]
- Replies: 3
- Views: 514
Re: on test? [ENDORSED]
the syllabus says what is going to be on each test exactly.
- Sat Nov 24, 2018 12:24 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: vsepr model
- Replies: 3
- Views: 451
Re: vsepr model
Im not sure if this was explained in lecture.
- Sat Nov 24, 2018 12:21 pm
- Forum: Hybridization
- Topic: Writing out Hybridization
- Replies: 8
- Views: 600
Re: Writing out Hybridization
in lecture Dr. Lavelle said it didn't matter where you placed D either in the beginning or end because he does it different from how the book does it.
- Sat Nov 24, 2018 12:19 pm
- Forum: Hybridization
- Topic: stating the hybridization of an atom
- Replies: 3
- Views: 411
Re: stating the hybridization of an atom
i would say it has to be 2 but maybe your TA can be more flexible with it so just ask to be safe
- Sat Nov 17, 2018 11:54 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Test 3
- Replies: 19
- Views: 1392
Re: Test 3
He said its easier if we memorize them so i suggest to learn.
- Sat Nov 17, 2018 11:52 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Polar and Dipole
- Replies: 3
- Views: 270
Re: Polar and Dipole
If a molecule is polarized then there is a positive and negative dipole
- Sat Nov 17, 2018 11:50 am
- Forum: Administrative Questions and Class Announcements
- Topic: How to find my posts
- Replies: 163
- Views: 168478
Re: How to find my posts
Does anyone what is going to be on exam three?
- Sat Nov 17, 2018 11:41 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Seesaw Shape
- Replies: 4
- Views: 426
Re: Seesaw Shape
Yeah but they will be just slightly less than those angles, but for approximation thats right.
- Sun Nov 11, 2018 12:08 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: Dipole Moment
- Replies: 3
- Views: 397
Re: Dipole Moment
The bond dipole moment uses the idea of electric dipole moment to measure the polarity of a chemical bond within a molecule. It occurs whenever there is a separation of positive and negative charges, or when more electrons are being pulled to one side more than the other.
- Sun Nov 11, 2018 12:06 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: Greater polarizability of larger molecules
- Replies: 6
- Views: 1159
Re: Greater polarizability of larger molecules
The greater the number of electrons, the less control the nuclear charge has on charge distribution, and thus the increased polarizability of the atom.
- Sun Nov 11, 2018 11:55 am
- 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 Bonds
- Replies: 14
- Views: 1046
Re: Hydrogen Bonds
yes its a dipole-dipole bond and it only works with the atoms N O F
- Sun Nov 11, 2018 11:52 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Boiling point
- Replies: 12
- Views: 2205
Re: Boiling point
The rod and spherical shaped molecules have different boiling points which is why they have different shapes. With spherical shaped molecules having a lower boiling point.
- Sun Nov 04, 2018 9:06 pm
- Forum: Administrative Questions and Class Announcements
- Topic: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
- Replies: 121
- Views: 19531
Re: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
Thank you for this review it has really been helping me understand things better!
- Sun Nov 04, 2018 8:15 pm
- Forum: Administrative Questions and Class Announcements
- Topic: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
- Replies: 121
- Views: 19531
Re: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
does anyone know how to solve 8b? i am having trouble with it.
- Sun Nov 04, 2018 6:32 pm
- Forum: Administrative Questions and Class Announcements
- Topic: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
- Replies: 121
- Views: 19531
Re: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
Can anyone explain the reasoning for why 6d is true.
- Sat Oct 27, 2018 6:59 pm
- Forum: Ionic & Covalent Bonds
- Topic: Chemical Bonding
- Replies: 8
- Views: 822
Re: Chemical Bonding
Yeah as of now we have just learned the basics of it but we should be going into more detail this coming week, but i do not know exactly how in depth we will go.
- Sat Oct 27, 2018 6:55 pm
- Forum: Ionic & Covalent Bonds
- Topic: Bond
- Replies: 9
- Views: 909
Re: Bond
I am pretty sure that we do not have to worry about that for this class because of their complexity, but it would be fun to know.
- Sat Oct 27, 2018 6:51 pm
- Forum: Ionic & Covalent Bonds
- Topic: Valence Electrons
- Replies: 4
- Views: 735
Re: Valence Electrons
Group 2 has 2 valence electrons and group 13 has 3 valence electrons........ etc...
- Sun Oct 21, 2018 9:29 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Test Question
- Replies: 8
- Views: 746
Re: Test Question
We dont need to draw them but know what each represents.
- Sun Oct 21, 2018 9:23 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Schrodinger's Wave Function
- Replies: 10
- Views: 1003
Re: Schrodinger's Wave Function
Just know the concepts behind the equation, but no calculation will be on the test. we are not expected to know how to do that.
- Sun Oct 21, 2018 9:20 pm
- Forum: Properties of Light
- Topic: Test #2
- Replies: 2
- Views: 348
Re: Test #2
Exams will always be in discussion, but midterm and final arent.
- Sun Oct 14, 2018 8:11 pm
- Forum: Einstein Equation
- Topic: Einstein's Equation: E=hv
- Replies: 11
- Views: 1574
Re: Einstein's Equation: E=hv
H is a constant and it is given to us.
- Sun Oct 14, 2018 8:10 pm
- Forum: Properties of Light
- Topic: C=Wavelength*Frequency
- Replies: 11
- Views: 3241
Re: C=Wavelength*Frequency
C is a constants that represents the speed if light which will be given.
- Sun Oct 14, 2018 8:08 pm
- Forum: Einstein Equation
- Topic: Numbers to memorize [ENDORSED]
- Replies: 37
- Views: 4182
Re: Numbers to memorize [ENDORSED]
Constants and equations will always be provided at the beginning of the test.
- Sun Oct 14, 2018 8:05 pm
- Forum: SI Units, Unit Conversions
- Topic: formula units [ENDORSED]
- Replies: 69
- Views: 32862
Re: formula units [ENDORSED]
The numbers on the numerator are constants which will always be given and they are found on the "constants and Equations" worksheet.
- Sun Oct 07, 2018 8:31 pm
- Forum: Limiting Reactant Calculations
- Topic: Theoretical Yield
- Replies: 7
- Views: 953
Re: Theoretical Yield
Its larger because its the maximum amount possible.
- Sun Oct 07, 2018 8:25 pm
- Forum: Properties of Light
- Topic: Chapter 1 Homework
- Replies: 6
- Views: 606
Re: Chapter 1 Homework
Porus_Karwa_3B wrote:Is Chapter 1 homework due in our next discussion period or is it due on the one after that?
I think they said to do problems that were relevant to what we were learning.
- Sun Oct 07, 2018 8:22 pm
- Forum: Balancing Chemical Reactions
- Topic: Balancing Procedure
- Replies: 7
- Views: 782
Re: Balancing Procedure
Celeste 1C wrote:Question h.1 asks why you can't just add an extra O molecule to balance the equation? Why wouldn't we be able to do that?
I remember that in lecture Dr. Lavelle said that atoms were not created nor destroyed.
- Sun Oct 07, 2018 12:45 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Registering/Creating Your Chemistry Community Account
- Replies: 40
- Views: 101102
Re: Registering/Creating Your Chemistry Community Account
They are due on Sunday.