Search found 15 matches

by Yael Breziner 1F
Fri Mar 04, 2016 5:35 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Strain
Replies: 1
Views: 295

Strain

Hi, I'm confused about the difference between steric strain, bond angle strain, and torsional strain. What are the differences?
by Yael Breziner 1F
Sat Feb 27, 2016 3:04 pm
Forum: Administrative Questions and Class Announcements
Topic: Final
Replies: 1
Views: 319

Final

Is the final exam cumulative or is it just material that we learned after the midterm?
by Yael Breziner 1F
Sun Feb 21, 2016 10:03 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Page 89 Coursereader
Replies: 1
Views: 313

Page 89 Coursereader

On page 89 in the coursereader, what does the exponent that looks like an = sign with a vertical line through it signify?
by Yael Breziner 1F
Tue Feb 09, 2016 3:43 pm
Forum: Balancing Redox Reactions
Topic: Midterm Winter 2012 Question 7B
Replies: 2
Views: 446

Midterm Winter 2012 Question 7B

why is the anode reaction written in the format as if it were a reduction if it is being oxidized? Also, don't you want to maximize the voltage to get a positive voltage so that it would give you a more negative G?
by Yael Breziner 1F
Tue Feb 09, 2016 3:16 pm
Forum: Balancing Redox Reactions
Topic: Midterm Winter 2012 Question 7A
Replies: 1
Views: 364

Midterm Winter 2012 Question 7A

Cu is being oxidized so the equation is in the format: Cu --> Cu2+ + 2e When given the Ecell of that reaction, the equation sheet says it is +.34 V when the equation is in the format Cu2+ + 2e --> Cu When finding the Ecathode by plugging in the Ecell that is given and the Eanode from the oxidized re...
by Yael Breziner 1F
Sat Feb 06, 2016 1:57 pm
Forum: First Order Reactions
Topic: Finding n and m
Replies: 1
Views: 330

Finding n and m

I'm a little confused on how to calculate n and m. It wasn't very clear in the coursereader how for a first order reaction they both equal 1 and how you can determine this.
by Yael Breziner 1F
Sun Jan 24, 2016 9:33 pm
Forum: Phase Changes & Related Calculations
Topic: Practice Quiz 1 Question 8
Replies: 2
Views: 456

Practice Quiz 1 Question 8

How do you know that bonds are being broken when going from Cl2 (g) --> 2Cl (g)?
by Yael Breziner 1F
Sat Jan 23, 2016 6:16 pm
Forum: Phase Changes & Related Calculations
Topic: Gibbs, Entropy, Enthalpy video
Replies: 1
Views: 295

Gibbs, Entropy, Enthalpy video

https://www.youtube.com/watch?v=XvuRJuXykyw

Pretty good video explaining basics of gibbs free energy, entropy, and enthalpy
by Yael Breziner 1F
Sun Jan 17, 2016 9:19 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Constant Temperature in Ideal Gas Expansion
Replies: 2
Views: 537

Constant Temperature in Ideal Gas Expansion

As mentioned in class, the system with an ideal gas and a vacuum will have a constant temperature becasue the energy that it loses when it is doing work is replaced by the heat of the surroundings going into the system. Does the heat coming into the system (q) come in for the purpose of maintaining ...
by Yael Breziner 1F
Fri Jan 15, 2016 3:03 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Work
Replies: 1
Views: 370

Work

In the equation w=-PdeltaV, Dr. Lavelle explained that Pressure is negative because it means that the system is pushing out and doing work against a positive pressure. Does this mean that we should always assume that there is a positive pressure going against the system? What if there is no pressure...
by Yael Breziner 1F
Sun Jan 10, 2016 3:16 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: enthalpy definition
Replies: 2
Views: 464

enthalpy definition

Page 16 of the coursereader says that enthalpy is "the amount of heat released/absorbed at a constant pressure." Why does enthalpy not include constant volume?
by Yael Breziner 1F
Sun Jan 10, 2016 2:24 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: constant volume and constant pressure
Replies: 1
Views: 330

constant volume and constant pressure

Dr. Lavelle mentioned in class that the numbers of constant volume and constant pressure will be different because in constant pressure there will be heat expansion but in constant volume there will not be heat expansion. But he said that with both liquids and gases that they will both expand but on...
by Yael Breziner 1F
Sun Jan 10, 2016 2:10 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: enthalpy
Replies: 2
Views: 422

enthalpy

In figure 8.18, it says that overall entropy change can be positive when the entropy of the system increases and also when the entropy of the system decreases and that in both cases it is spontaneous. How can the overall entropy change be positive in both cases if in one reaction the entropy increas...

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