Search found 13 matches
Search found 13 matches • Page 1 of 1
I feel like it would be most important to know neo- and iso-, probably not so much for the other ones listed in the course reader. I remember Dr. Lavelle saying that some of the common names are actually not commonly used anymore (like vinyl I think).
- Mon Feb 27, 2017 7:47 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Midterm Problem 1A
- Replies: 1
- Views: 368
The question asks for standard enthalpy of formation, which is always going to be kJ/mol. By definition, standard enthalpy of formation is "the change in enthalpy when one mole of a substance in the standard state (1 atm of pressure and 298.15 K) is formed from its pure elements under the same ...
- Tue Feb 21, 2017 10:17 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 2 Winter 2017
- Replies: 160
- Views: 16588
604735966 wrote:As for number 7, when do we know to use the rearranged integrated rate law and when to use the differential rate law?
You use the integrated rate law when time is involved.
- Tue Feb 14, 2017 10:10 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: Midterm Winter 2013 problem 5B
- Replies: 10
- Views: 1062
Chiao-Wei Cheng 3e wrote:Correct if I'm wrong, I think molar mass is related to molecules quantity, related to the W in S=klnW. Therefore, entropy will increase with the increase of the molar mass.
W is just (# of orientations)^(# of particles), so I don't think W has to do with the molar mass of one single molecule
- Tue Feb 14, 2017 2:49 am
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: midterm 2015 #4&5 B
- Replies: 3
- Views: 521
It comes from Cv = (3/2)R, given in the formula sheet. It's the molar heat capacity at constant volume for a monoatomic ideal gas.
- Wed Jan 18, 2017 3:39 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 7951
- Views: 1215562
Two chemists go into a bar. The first one says "I think I'll have an H2O." The second one says "I think I'll have an H2O too" — and he died.