Search found 11 matches

by Melody Li 2L
Mon Mar 13, 2017 11:01 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1020308

Re: Post All Chemistry Jokes Here

Why did the acid go to the gym?
To become a buffer solution.
by Melody Li 2L
Sat Mar 11, 2017 8:33 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1020308

Re: Post All Chemistry Jokes Here

Q: What do chemists call a benzene ring with iron atoms replacing the carbon atoms?
A: A ferrous wheel.
by Melody Li 2L
Wed Mar 01, 2017 11:48 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1020308

Re: Post All Chemistry Jokes Here

orgchem.gif
orgchem.gif (8.88 KiB) Viewed 7149 times
by Melody Li 2L
Mon Feb 20, 2017 7:29 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1020308

Re: Post All Chemistry Jokes Here

chem joke.jpg
chem joke.jpg (17.17 KiB) Viewed 6922 times
by Melody Li 2L
Tue Feb 14, 2017 9:13 pm
Forum: Phase Changes & Related Calculations
Topic: Winter Midterm 2015 4&5 D
Replies: 2
Views: 325

Winter Midterm 2015 4&5 D

"In Potions class, Professor Snape wants to stump Harry with a challenging question, so he asks harry to calculate the entropy of vaporization for 1.0 mole of water at room temperature (298K). Harry thinks this task is impossible since water has a boiling point of 373K, but you know better. giv...
by Melody Li 2L
Wed Feb 08, 2017 5:18 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1020308

Re: Post All Chemistry Jokes Here

chem joke.jpg
by Melody Li 2L
Mon Jan 30, 2017 7:02 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1020308

Re: Post All Chemistry Jokes Here

Screen Shot 2017-01-30 at 7.02.17 PM.png
by Melody Li 2L
Fri Jan 27, 2017 8:30 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Quiz 1 Prep #5
Replies: 5
Views: 1102

Re: Quiz 1 Prep #5

^^ Like said above, not sure if there was an error in the equation but it was not originally balanced therefore the original reaction should be: N2H4(l) + H2(g) -> 2NH3(g) once you balance it .From here, your equation has 2NH3 in the product side and your end reaction should match the original react...
by Melody Li 2L
Wed Jan 25, 2017 10:09 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Quiz 1 Preparation, Question #4
Replies: 1
Views: 371

Re: Quiz 1 Preparation, Question #4

Hello,
Yes, your approach to this question is correct. The enthalpy of sublimation is equal to enthalpy of fusion + enthalpy of vaporization. Therefore, just substitute each enthalpy value into the equation and solve for enthalpy of vaporization. The answer should be 29.5 kJ/mol.
by Melody Li 2L
Sun Jan 22, 2017 5:22 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7609
Views: 1020308

Re: Post All Chemistry Jokes Here

The Pope calls a conference at the Vatican. 6.022 x 10^23 priests attend. The name of the conference was named "Holy Mole-y."
by Melody Li 2L
Sun Jan 15, 2017 8:18 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Hw question 8.57
Replies: 3
Views: 293

Re: Hw question 8.57

In this problem specifically, I believe you need to use Hess's Law because after balancing the equations of C2H2, C2H6 and H2 using combustion, one of the equations will be flipped/reversed in order to do cancellation. This reversed equation will result in a sign change of the enthalpy. (Ex: If chan...

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