Search found 23 matches
- Wed Mar 15, 2017 1:55 am
- Forum: Phase Changes & Related Calculations
- Topic: Homework 8.27
- Replies: 6
- Views: 2716
Re: Homework 8.27
For part b, I got -1061.4 J. I used the equation -nRTln(Vf/Vi). I set n=1, 8.314 as the gas constant R, 305 K as my temperature T, my final volume as 6.52 L, and my initial volume as 4.29 L. However, the answer at the back of the book is -326 J. What did I do wrong?
- Tue Mar 14, 2017 8:58 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Homework 8.11
- Replies: 3
- Views: 2357
Re: Homework 8.11
In the answer in the book, it states that part b, reversible expansion, does more work? Why is that so?
- Thu Mar 09, 2017 7:26 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz #3
- Replies: 6
- Views: 1355
Re: Quiz #3
Thank you!
- Thu Mar 09, 2017 11:11 am
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 3 Prep answers
- Replies: 6
- Views: 1270
Re: Quiz 3 Prep answers
I'm always wondering where the Quiz 3 practice answers are posted to check my solutions.
- Tue Feb 28, 2017 10:19 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3006199
Re: Post All Chemistry Jokes Here
Are you made up of a 4 carbon chain? Because you're butyl-ful.
- Tue Feb 28, 2017 10:09 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz #3
- Replies: 6
- Views: 1355
Re: Quiz #3
So it will include activation energy, reaction mechanisms, and naming organic compounds?
- Wed Feb 22, 2017 12:38 pm
- Forum: General Rate Laws
- Topic: Units for Reaction Rate and the Rate Constant
- Replies: 3
- Views: 1137
Units for Reaction Rate and the Rate Constant
In general, what are the units for the reaction rate and the rate constant? I mean individually of course as the they are different values.
- Wed Feb 22, 2017 11:43 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3006199
Re: Post All Chemistry Jokes Here
My tendency to always sleep is directly related to the tendencies of the electrons inside of me, they're always trying to be in their lowest energy state.
- Sun Feb 12, 2017 9:41 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Winter 2013 Midterm Q2A
- Replies: 10
- Views: 1499
Re: Winter 2013 Midterm Q2A
I am also having a difficult time trying to figure out how one would derive the equation to solve the problem?
- Wed Feb 01, 2017 11:50 am
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 1: Formulas We Need To Know
- Replies: 2
- Views: 665
Quiz 1: Formulas We Need To Know
Are there any formulas for quiz 1 we need to know that will not be on the formula sheet?
- Wed Feb 01, 2017 10:55 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3006199
Re: Post All Chemistry Jokes Here
I should probably study for my quiz . . . or NaW
- Wed Feb 01, 2017 10:51 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3006199
Re: Post All Chemistry Jokes Here
Q. Why did the chemistry student fall asleep during?
A. Because it was boron.
A. Because it was boron.
- Wed Jan 18, 2017 9:11 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz Topics
- Replies: 10
- Views: 1842
Re: Quiz Topics
As a follow-up question, I wanted to ask whether we will receive some sort of quiz preparation. For Chem 14A, I know we had a quiz booklet with practice problems with solutions, as well as turn-in quizzes. We will have something like that this quarter?
- Sat Dec 03, 2016 9:41 am
- Forum: Student Social/Study Group
- Topic: Sproul Hall Chem14A Study Group
- Replies: 30
- Views: 3903
Re: Sproul Hall Chem14A Study Group
Does anyone know if the midterms answers were posted anywhere? I'm going over problems from the midterm to study and I'm wondering if there is a way to check my solutions.
- Tue Nov 29, 2016 10:49 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: change in temperature
- Replies: 2
- Views: 562
Re: change in temperature
Does temperature also affect the K value, the equilibrium constant?
- Wed Nov 16, 2016 9:09 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Are the coordination numbers just inside of brackets? [ENDORSED]
- Replies: 4
- Views: 1342
Re: Are the coordination numbers just inside of brackets? [ENDORSED]
So what about another example, like [Fe(ox)(CO)2(NH3)]H2O for instance. What would be the coordination number?
- Mon Nov 14, 2016 6:42 am
- Forum: Student Social/Study Group
- Topic: Sproul Hall Chem14A Study Group
- Replies: 30
- Views: 3903
Re: Sproul Hall Chem14A Study Group
Anyone want to study for Quiz 3 this week?
- Sun Nov 06, 2016 3:04 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Molecular Orbital Theory
- Replies: 4
- Views: 840
Re: Molecular Orbital Theory
Does anyone know any videos or resources that aid in showing how to draw out the molecular orbital energy diagrams?
- Mon Oct 24, 2016 10:16 pm
- Forum: Lewis Structures
- Topic: Lewis Structures Charges Always Balanced?
- Replies: 1
- Views: 433
Lewis Structures Charges Always Balanced?
Is the ideal Lewis Structure always balanced? To be more specific, will the formal charge on every atom in a molecule always be zero? Or will the most ideal state of a molecule sometimes have atoms with positive or negative formal charges?
- Sun Oct 23, 2016 10:14 pm
- Forum: Lewis Structures
- Topic: Lewis Structures
- Replies: 3
- Views: 720
Re: Lewis Structures
Joseph Lew 1K wrote:When making a Lewis structure should I assume it is correct if I used the correct number of electrons or should I check formal charge to make sure I have the correct bonds?
You should check the formal charge to ensure that the molecule is at its most ideal state.
- Sat Oct 15, 2016 7:41 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionization Energy
- Replies: 7
- Views: 1516
Re: Ionization Energy
Is the second ionization energy always more than the first for every atom? The second ionization energy is always stronger because there will be a greater ratio of protons to electrons. During the first ionization of an element there is an equal number of protons and electrons. However, during the ...
- Mon Oct 03, 2016 3:00 pm
- Forum: Student Social/Study Group
- Topic: Sproul Hall Chem14A Study Group
- Replies: 30
- Views: 3903
Re: Sproul Hall Chem14A Study Group
I like Juan's idea of studying from 7-9pm on the days we have class, which would be Monday, Wednesday, and Friday.
- Wed Sep 28, 2016 8:56 pm
- Forum: Student Social/Study Group
- Topic: Sproul Hall Chem14A Study Group
- Replies: 30
- Views: 3903
Re: Sproul Hall Chem14A Study Group
I live in Sproul Hall! The first thing that came to mind after the first lecture was that I need people to study with. So hopefully in the very near future we can come up with times to do homework together and study together.