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Week 3 Test

Posted: Fri Jan 19, 2018 11:16 pm
by nathansalce 3e
Does anybody know, in terms of the assigned homework for this chapter, what numbered problems correlate to what we are actually being tested on in Week 3?, Professor has talked about omitting part of the chapter, the part he is teaching next week, but what numbered problems should I be doing to prepare myself for Week 3's Test?

Re: Week 3 Test

Posted: Sat Jan 20, 2018 11:42 am
by Christine Wastila 1H
In terms of numbered problems, the only ones I see that have isothermal reversible expansion are 8.11 part B and 8.12 part B, so just omit those.

Re: Week 3 Test 1  Topic is endorsed

Posted: Sat Jan 20, 2018 12:44 pm
by Chem_Mod
Test 1: I have decided that we need to do more examples and you need more time for ‘work’ and ‘energy’. :-)

Calculations involving work and internal energy will not be on Test 1.

Concept questions involving work and internal energy will be on Test 1, but not calculating w and delta U.

Re: Week 3 Test

Posted: Sat Jan 20, 2018 3:58 pm
by Sarah Wax 1G
Also, anything involving bond enthalpies, enthalpies of formation, and calculating energy from a calorimeter will be on the test.

Re: Week 3 Test

Posted: Sun Jan 21, 2018 4:28 pm
by Sabrina Fardeheb 2B
I would focus more on the concepts of work and internal energy as well as calculating enthalpy and heat. This includes: the different methods of solving for enthalpy, calorimeter calculations. Don't worry about the equations that you need to calculate the actual work and internal energy. Hope this helps!

Re: Week 3 Test

Posted: Sun Jan 21, 2018 5:56 pm
by Essly Mendoza 1J
Does anyone know which homework problems from Chapter 8 are the ones we don't need to study for test 1?

Re: Week 3 Test

Posted: Sun Jan 21, 2018 6:07 pm
by Miranda 1J
For the test do we need to know how to derive the work equation? I know Dr. Lavelle said work and DU won't be on the test but this seems like a conceptual thing to me so I'm not entirely sure.

Re: Week 3 Test

Posted: Sun Jan 21, 2018 8:41 pm
by zanekoch1A
Does anyone know if the born-haber cycle will be tested? There is a whole section on it in the chapter but we have not talked about it in class

Re: Week 3 Test

Posted: Sun Jan 21, 2018 8:51 pm
by Mishta Stanislaus 1H
Miranda 1J wrote:For the test do we need to know how to derive the work equation? I know Dr. Lavelle said work and DU won't be on the test but this seems like a conceptual thing to me so I'm not entirely sure.



I have this same question

Re: Week 3 Test

Posted: Sun Jan 21, 2018 9:01 pm
by Warda Sahib 2J
Does Dr. Lavelle only test on things he's talked about?

Re: Week 3 Test

Posted: Sun Jan 21, 2018 9:02 pm
by Jack Papciak 2F
Are there any formulas that we need to memorize?

Re: Week 3 Test

Posted: Sun Jan 21, 2018 9:05 pm
by Veritas Kim 2L
If you look at the outline for chapter 8, it says that born-haber is not included!

Re: Week 3 Test

Posted: Sun Jan 21, 2018 9:15 pm
by Sarah Clemens 1B
Can anyone give me an example of a conceptual question that has to do with work or energy?

Re: Week 3 Test

Posted: Sun Jan 21, 2018 10:00 pm
by Katie Blann 1E
Will we have an equation sheet and necessary values provided for the test?

Re: Week 3 Test

Posted: Sun Jan 21, 2018 10:37 pm
by Thompson W 2C
Yes, a formula sheet with constants and equations will be provided.
Here's the sheet: https://lavelle.chem.ucla.edu/wp-conten ... ations.pdf

Re: Week 3 Test

Posted: Sun Jan 21, 2018 10:40 pm
by Thompson W 2C
I believe any necessary values would be given as well.

Re: Week 3 Test

Posted: Sun Jan 21, 2018 11:17 pm
by 104922499 1F
Mishta Stanislaus 1H wrote:
Miranda 1J wrote:For the test do we need to know how to derive the work equation? I know Dr. Lavelle said work and DU won't be on the test but this seems like a conceptual thing to me so I'm not entirely sure.



I have this same question


this is equation 4, and Lavelle said not to worry about it for test 1. But know conceptually

Re: Week 3 Test

Posted: Mon Jan 22, 2018 12:15 am
by ZoeHahn1J
Calculating values for work, internal energy and solving reversible expansion problems will not be on the test!

Re: Week 3 Test

Posted: Mon Jan 22, 2018 12:29 am
by Nickolas Manipud 1C
Doing ALL the problems (except for the ones he said to skip) he assigns will prepare you enough for the test

Re: Week 3 Test

Posted: Mon Jan 22, 2018 4:14 pm
by Natalie LeRaybaud 1G
After going through the homework I noticed numbers 3-13,25-31, and 47-49 all have to do with calculating work or internal energy. I would suggest studying all the other homework problems specifically for this upcoming test.

Re: Week 3 Test

Posted: Mon Jan 22, 2018 11:46 pm
by Lauryn Jordan 1F
will internal energy be on the test?

Re: Week 3 Test

Posted: Mon Jan 22, 2018 11:54 pm
by Patricia Macalalag 2E
Lauryn Jordan 1F wrote:will internal energy be on the test?


We won't be required to solve for internal energy, I believe, but there will probably be concept questions on it.

Re: Week 3 Test

Posted: Tue Jan 23, 2018 1:27 am
by Jennifer Ho 1K
how similar are the homework questions to lavelle's test questions?

Re: Week 3 Test

Posted: Tue Jan 23, 2018 10:31 am
by Sara Sasaki 1K
Warda Sahib 2E wrote:Does Dr. Lavelle only test on things he's talked about?

For the most part, Dr. Lavelle covers everything we should know for the test conceptually with some examples, but it's definitely recommended to prepare by doing the homework while also reviewing notes!

Re: Week 3 Test

Posted: Tue Jan 23, 2018 10:37 am
by Sara Sasaki 1K
Jennifer Ho 1K wrote:how similar are the homework questions to lavelle's test questions?

Dr. Lavelle usually includes a homework problem or one that is very similar to the homework in his tests, so it can be pretty similar. In general I find it really helpful to do the homework! If anything, sometimes the homework can be less straightforward than test problems.

Re: Week 3 Test

Posted: Tue Jan 23, 2018 11:48 am
by Michelle Steinberg2J
Warda Sahib 2E wrote:Does Dr. Lavelle only test on things he's talked about?


In 14A it was pretty much if he didn't cover the topic in class then we do not need to know it for the test. The HW problems are pretty good indicators of what he will test on.

Re: Week 3 Test

Posted: Tue Jan 23, 2018 11:49 am
by Michelle Steinberg2J
What sort of concepts should we be comfortable with for internal energy and work? I'm confused what we will be tested on conceptually - I feel like internal energy and work deals mostly with calculations.

Thanks!!

Re: Week 3 Test

Posted: Tue Jan 23, 2018 12:18 pm
by Mishta Stanislaus 1H
Natalie LeRaybaud 1G wrote:After going through the homework I noticed numbers 3-13,25-31, and 47-49 all have to do with calculating work or internal energy. I would suggest studying all the other homework problems specifically for this upcoming test.


Can anyone else confirm that these problems aren't going to be tested on?

Re: Week 3 Test

Posted: Tue Jan 23, 2018 3:48 pm
by Lorie Seuylemezian-2K
Mishta Stanislaus 1H wrote:
Natalie LeRaybaud 1G wrote:After going through the homework I noticed numbers 3-13,25-31, and 47-49 all have to do with calculating work or internal energy. I would suggest studying all the other homework problems specifically for this upcoming test.


Can anyone else confirm that these problems aren't going to be tested on?


I hav the same question

Re: Week 3 Test

Posted: Tue Jan 23, 2018 4:32 pm
by melissa carey 1f
Will we be tested on memorizing the formulas in section 8.10: A Molecular Interlude: The Origin of the Heat Capacities of Gases? Thanks!

Re: Week 3 Test

Posted: Tue Jan 23, 2018 8:52 pm
by Christiana2D
melissa carey 1f wrote:Will we be tested on memorizing the formulas in section 8.10: A Molecular Interlude: The Origin of the Heat Capacities of Gases? Thanks!

These equations are included on the constants and equations worksheet. We would likely just need to know how to apply them.

Re: Week 3 Test

Posted: Tue Jan 23, 2018 10:09 pm
by Nha Dang 2I
Jennifer Ho 1K wrote:how similar are the homework questions to lavelle's test questions?


On the syllabus, it says, "Homework problems will be included in tests and exams"! And I believe I saw somewhere that said at least 1 homework problem will be on the test? Either way, doing the homework always helps for Lavelle's tests!

Re: Week 3 Test

Posted: Tue Jan 23, 2018 10:17 pm
by Renee Delamater 2H
Content from this week won't be on the exam, right? I'm pretty sure it's just material from Weeks 1 and 2

Re: Week 3 Test

Posted: Wed Jan 24, 2018 12:53 am
by lauren chung 2f
Yes, he wrote on his website that the test will only have material covered in weeks 1 and 2.

Re: Week 3 Test

Posted: Wed Jan 24, 2018 4:42 pm
by rkusampudi
There are no calculations on heat and internal energy but you do have to understand the concepts.

Re: Week 3 Test

Posted: Wed Jan 24, 2018 5:51 pm
by Adam Enomoto 1L
understanding the concepts just means like being able to interpret what the equations solve for?

Re: Week 3 Test

Posted: Thu Jan 25, 2018 12:07 am
by Chloe1K
what is an example of a conceptual question in terms of internal energy?

Re: Week 3 Test

Posted: Fri Jan 26, 2018 12:59 am
by Hellen Truong 2J
Chloe1K wrote:what is an example of a conceptual question in terms of internal energy?

I think for example he could give you a scenario where the walls between the system and the surroundings are adiabatic. Then, it could be true/false for a series of things like:

q=0 True
q>0 False
delta U = w True
delta U = q True if w=0