Search found 8 matches
- Sun Mar 19, 2017 9:13 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3637575
Re: Post All Chemistry Jokes Here
I ran out of chemistry jokes... I should ZINC of a new one.
- Sun Mar 05, 2017 5:50 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3637575
- Sun Feb 26, 2017 8:33 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3637575
- Sun Feb 19, 2017 10:34 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3637575
Re: Post All Chemistry Jokes Here
How are oxidation-reduction reactions different than a clothing store?...
At the clothing store, when the price is reduced, it doesn't gain anything.
At the clothing store, when the price is reduced, it doesn't gain anything.
- Sun Feb 12, 2017 11:06 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Entropy at 0k
- Replies: 1
- Views: 504
Entropy at 0k
Hello,
I want to clarify why molecules differ in entropy when they are at 0k? We had a question like this on the quiz and I thought the molecules had no entropy because there was no movement at 0k and because of the third law of thermodynamics? Please explain. Thank you in advance.
I want to clarify why molecules differ in entropy when they are at 0k? We had a question like this on the quiz and I thought the molecules had no entropy because there was no movement at 0k and because of the third law of thermodynamics? Please explain. Thank you in advance.
- Sun Feb 05, 2017 11:56 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Porous disk versus salt bridge
- Replies: 1
- Views: 299
Porous disk versus salt bridge
Hello,
I was wondering if theres a difference between using a porous disk or a salt bridge in terms of their function in the galvanic cell? Also if there is should we know when we should be using one or the other when drawing the galvanic cell.
Thank you in advance.
I was wondering if theres a difference between using a porous disk or a salt bridge in terms of their function in the galvanic cell? Also if there is should we know when we should be using one or the other when drawing the galvanic cell.
Thank you in advance.
- Sun Jan 29, 2017 10:19 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Homework Problem 8.63
- Replies: 1
- Views: 1071
Re: Homework Problem 8.63
I believe this problem was a typo in the book and used -417.5 kj/mol as the enthalpy of formation for K2S(aq) instead of -471.5 kj/mol (which is what Appendix 2A says). I got the same answer you did.
- Sun Jan 22, 2017 11:17 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Exercise 8.41
- Replies: 2
- Views: 581
Re: Exercise 8.41
Exercises 8.21 and 8.41 are similar except in exercise 8.41 the ice is going through a phase change so you have to calculate the heat required for that to occur (hence using the enthalpy of fusion) along with the heat calculated by using (mass x specific heat x change in temperature) equation. In 8....