Search found 14 matches

by Melissa Folkerts 2C
Fri Mar 11, 2016 10:41 am
Forum: Administrative Questions and Class Announcements
Topic: Winter 2016 Final Exam Review and Information
Replies: 25
Views: 16885

Re: Winter 2016 Final Exam Review and Information

Will Dr. Lavelle's review of physical chemistry today be posted on to the bruincast website? Unfortunately I have a dress rehearsal to attend. :(
by Melissa Folkerts 2C
Fri Mar 11, 2016 12:21 am
Forum: Administrative Questions and Class Announcements
Topic: Chemistry Community Points
Replies: 11
Views: 1232

Re: Chemistry Community Points

:,( So sad. Thanks haha. I always forgot ahh.
by Melissa Folkerts 2C
Fri Mar 11, 2016 12:12 am
Forum: Administrative Questions and Class Announcements
Topic: Chemistry Community Points
Replies: 11
Views: 1232

Chemistry Community Points

If I answered/asked multiple posts in one week, but missed a couple weeks is it still possible for me to get the full 10 points? In other words, can we just total ten posts to get the points? Thanks!
by Melissa Folkerts 2C
Fri Mar 11, 2016 12:09 am
Forum: *Alcohols
Topic: Considering an Alcohol
Replies: 1
Views: 2222

Considering an Alcohol

First is it possible to have an -OH attached to a R-O? Like: R-O-OH? If it is possible, would it still be considered an alcohol and how would name it? Thanks!
by Melissa Folkerts 2C
Sun Feb 07, 2016 10:53 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Standard G
Replies: 1
Views: 352

Re: Standard G

When delta G=0, this means that the reaction is at equilibrium. It is most likely tha under standard conditions, the reaction has reached equilibrium. Furthermore, "k" is the ratio of the concentrations of products and reactants when the reaction is at equilibrium. So when Q=K, it is at eq...
by Melissa Folkerts 2C
Sun Feb 07, 2016 10:49 pm
Forum: Balancing Redox Reactions
Topic: Reduction and Oxidation
Replies: 6
Views: 781

Re: Reduction and Oxidation

Well the easiest (and most clever lol) way is to remember that LEO says GER. As in, Losing Electrons is Oxidation and Gaining Electrons is Reduction. To figure out which is which, pay attention to the oxidation number in the reaction. For example, if it goes from a 2+ charge to a neutral charge, tha...
by Melissa Folkerts 2C
Mon Jan 25, 2016 1:12 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: HW question #73 B
Replies: 2
Views: 339

Re: HW question #73 B

Oh jeez I just realized it's not C2H4, sorry. But thanks!!
by Melissa Folkerts 2C
Sun Jan 24, 2016 11:00 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: HW question #73 B
Replies: 2
Views: 339

HW question #73 B

Why is it that we do not calculate the bonds breaking between the carbons in this question? The reaction with the carbon goes from CH4 to CCl4. Are the bonds not breaking to form this or are they its not included for some reason?
by Melissa Folkerts 2C
Sun Jan 17, 2016 9:43 pm
Forum: Calculating Work of Expansion
Topic: Changing the energy of a system
Replies: 1
Views: 328

Re: Changing the energy of a system

The system with a solid or liquid has a set volume. With gases, the particles can move around and changing the volume of the system is easier for gases. For example, a piston may be used to change the volume of the gas in a system as Dr. Lavelle explained in class. However, this is not really done w...
by Melissa Folkerts 2C
Sun Jan 17, 2016 9:17 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: Entropy and Spontaneity
Replies: 2
Views: 537

Re: Entropy and Spontaneity

As the textbook states, "entropy is a measure of disorder," and "the entropy of an isolated system increases in any spontaneous process according to the second law of thermodynamics." Reactions that occur spontaneously in nature have an increase in entropy (a measure of disorder)...
by Melissa Folkerts 2C
Sun Jan 17, 2016 9:06 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Quiz #1 Workbook
Replies: 2
Views: 457

Re: Quiz #1 Workbook

Hi! It depends on the TA, I believe. I know for Erkkila, you can scan someone else's and do it from there.
by Melissa Folkerts 2C
Fri Jan 08, 2016 10:26 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Specific Heat Capacities of Gases
Replies: 1
Views: 411

Specific Heat Capacities of Gases

I understand that when the pressure is kept constant on a gas that is heated, there is a change in volume and work is done. So, is the specific heat capacity different for the gas when pressure is constant versus when volume is constant because energy is used to do work? Thanks! Just want a bit of c...
by Melissa Folkerts 2C
Mon Nov 30, 2015 7:23 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Video: Molecular Orbital Theory Application Example
Replies: 1
Views: 354

Video: Molecular Orbital Theory Application Example

*Mistake: I say at one point in the video that the sigma would be higher in energy than the two pi's but I meant that it would be lower in energy than the two pi's that precede it (1:10) Thanks!
by Melissa Folkerts 2C
Fri Oct 02, 2015 11:37 pm
Forum: Properties of Electrons
Topic: Schrodinger's Wave Function Equation
Replies: 1
Views: 500

Schrodinger's Wave Function Equation

For the wave function graphs that are in the course reader, is psi by itself ever used or do we always measure probability only by the psi^2 graph? Also, since the height (y-axis) of the psi^2 graph represents the probability, does the x-axis represent a specific location in the atom?

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