Search found 11 matches

by Athena Dong 2A
Sat Mar 18, 2017 5:38 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Final 2013 Question 4
Replies: 2
Views: 503

Re: Final 2013 Question 4

Does it seem that we will be deducted for using one equation versus the other if pH is not a factor?
by Athena Dong 2A
Sun Mar 12, 2017 12:33 am
Forum: *Cycloalkanes
Topic: Problem 1.16
Replies: 1
Views: 761

Re: Problem 1.16

Prefixes such as 'iso' and 'neo' are included as part of a substituent name, so they are subject to being placed in alphabetical order. As a result, isopropyl would be considered with the 'i', so it would come before dimethyl, which is considered with the 'm'.
by Athena Dong 2A
Sat Mar 04, 2017 11:25 pm
Forum: *Alkanes
Topic: Self-Test 1.3A [ENDORSED]
Replies: 1
Views: 342

Self-Test 1.3A [ENDORSED]

For part (b) of self-test 1.3A, why is the answer 2,3-Dimethylhexane? I'm not sure if I'm reading it incorrectly, but it seems like there's only one substituent attached to the 2nd carbon ( starting from the right ).

Thank you~!
by Athena Dong 2A
Sat Feb 25, 2017 4:30 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Collision Theory & Transition State Theory
Replies: 1
Views: 355

Collision Theory & Transition State Theory

I recognize that collision and transition state theory were not covered extensively in class- but they were included in the readings noted on the kinetics outline from the Chem 14B site. From what I understand, some aspects of these theories are relevant to the Arrhenius equation. For future referen...
by Athena Dong 2A
Tue Feb 14, 2017 5:41 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 14.11 D
Replies: 1
Views: 308

14.11 D

Write the half-reactions and the balanced equation for the cell reaction for each of the following galvanic cells: (d) Pt( s ) | O2 ( g ) | H+ ( aq ) || OH- ( aq ) | O2 ( g ) | Pt ( s ) In the oxidation/ anode equation, it seems that the reaction would entail O2 ( g ) going to H+ ( aq ). However, i...
by Athena Dong 2A
Sat Feb 11, 2017 11:23 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Diagram Conventions [ENDORSED]
Replies: 3
Views: 1144

Cell Diagram Conventions [ENDORSED]

I noticed that it appears a cell diagram will conventionally have the anode on the left and the cathode on the right. Are there instances when the positions of the anode and cathode would be switched ( i.e. anode on right and cathode on left )? From what I'm understanding, the first diagram would ap...
by Athena Dong 2A
Mon Jan 30, 2017 6:22 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Finding Gibbs Free Energy - 9.55 and 9.57
Replies: 1
Views: 358

Finding Gibbs Free Energy - 9.55 and 9.57

I noticed that there are two methods in the solutions manual for calculating the Gibbs free energy of a reaction: 1) \Delta G =\sum \mathit{n}\Delta G_{f}(prod) - \sum \mathit{n}\Delta G_{f}°(reac) 2) \Delta G = \Delta H - T\Delta S They seem interchangeable for problems 9.55 and 9.5...
by Athena Dong 2A
Tue Jan 24, 2017 4:01 pm
Forum: Calculating Work of Expansion
Topic: Quiz 1 || Question 3 || Which R?
Replies: 1
Views: 308

Quiz 1 || Question 3 || Which R?

We went over Question #3 on Quiz 1 in my discussion section today, and though I recognize that we use the formula w = -nRT ln( V2/V1 ) , the R value used for the in-class explanation was 0.08206 L . atm/ K . mol. When I was doing the practice quiz earlier, I had used the 8.314 J/ K . mol value and o...
by Athena Dong 2A
Sun Jan 22, 2017 3:26 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: HW 8.65
Replies: 1
Views: 249

Re: HW 8.65

Through manipulation of the equations that you mentioned before, we get the equation: 4 NO ( g ) + 3 O2 ( g ) -> 2 N2O5 ( g ) I'm guessing from your post that you were able to get the equation for the reaction, but let me know if you need help with that too! We know from Hess's law ( i.e., adding th...
by Athena Dong 2A
Tue Jan 17, 2017 10:53 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Homework 8.29: Need Clarification [ENDORSED]
Replies: 3
Views: 607

Re: Homework 8.29: Need Clarification [ENDORSED]

In addition, section 8.10 of the book states that molar heat capacity increases with a molecule's complexity. The molar heat capacity ( Cm ) of a nonlinear molecule is greater than that of a linear molecule, because a nonlinear molecule can rotate more ( around more axes ). Gases composed of molecul...
by Athena Dong 2A
Wed Jan 11, 2017 11:52 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Ch.8 Exercise 31
Replies: 2
Views: 317

Re: Ch.8 Exercise 31

Also, because Kr(g) is a monatomic gas, I believe we can use the molar heat capacities at constant volume ( 3/2 R ) and constant pressure ( 5/2 R ) for the 'C' part of the equation. R here refers to the ideal gas constant; the 8.314 J.K^-1.mol^-1 value works well because it corresponds to the proble...

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