Search found 11 matches

by Victoria Liang 3L
Sat Mar 14, 2015 5:47 pm
Forum: *Organic Reaction Mechanisms in General
Topic: How to draw curved arrows?
Replies: 6
Views: 5236

Re: How to draw curved arrows?

The tail of the arrow is from the the source of the electron and the arrow goes to where the election goes. For example in step 1 of q6, the electron source is the bond between N and H. The electrons go to the N and leaves the H with no electrons. However, I am confused about step 3. The arrows show...
by Victoria Liang 3L
Sat Mar 14, 2015 1:46 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gibbs as a State Function
Replies: 1
Views: 727

Gibbs as a State Function

In 2013 Final Q2A, I know you can add the gibbs free energy because it's a state function. We were given:
NADH > NAD+ + H+ + 2e- deltaG is -158.3KJ.
However why did this energy change to -158.2 KJ in the calculations? Was this just a typo?
by Victoria Liang 3L
Sat Mar 14, 2015 1:29 am
Forum: *Cycloalkenes
Topic: Final 2012 Q5: configuration of a cyclooctenone
Replies: 6
Views: 1119

Re: Final 2012 Q5

Never mind, I miss read the post; it only said "Cyclopropene, cyclobutene, cyclopentene, cyclohexene"
However, I'm still a little confused on how to determine cis or trans when theres no 3D model, like in this question for Q5 on 2012 final.
by Victoria Liang 3L
Sat Mar 14, 2015 1:24 am
Forum: *Cycloalkenes
Topic: Final 2012 Q5: configuration of a cyclooctenone
Replies: 6
Views: 1119

Re: Final 2012 Q5

Shouldn't this molecule be cis no matter what? Because if the double bond was trans, this molecule wouldn't be possible as stated on a similar question on this post: https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=86&t=3763"onclick="window.open(this.href);return false; And because this molec...
by Victoria Liang 3L
Fri Mar 13, 2015 11:21 pm
Forum: *Alkanes
Topic: Molecular Formula
Replies: 1
Views: 386

Molecular Formula

I was wondering in problem 8D of 2011 Final, theres a Newman projection of 1-chloro-5fluorohexane. One of the molecular formulas in the anti position is CFHCH3. Would it be wrong if I wrote CHCH3F or CHFCH3? How do you know the order to write the atoms?
by Victoria Liang 3L
Tue Feb 10, 2015 1:06 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: When to use Cv vs Cp
Replies: 6
Views: 950

Re: When to use Cv vs Cp

Someone answer this please.
by Victoria Liang 3L
Tue Feb 10, 2015 9:15 am
Forum: Phase Changes & Related Calculations
Topic: State Functions
Replies: 4
Views: 710

Re: State Functions

Sorry, I have an older course reader. Maybe it was a typo.
by Victoria Liang 3L
Mon Feb 09, 2015 9:36 pm
Forum: Phase Changes & Related Calculations
Topic: State Functions
Replies: 4
Views: 710

Re: State Functions

Thanks, I was a little confused because on the first page of thermochemistry in the course reader, it said E is a state function.
by Victoria Liang 3L
Mon Feb 09, 2015 8:00 pm
Forum: Phase Changes & Related Calculations
Topic: State Functions
Replies: 4
Views: 710

State Functions

In the practice midterm of 2014 5C, the answers say that E is a path function, not a state function.
Why? I thought E was a state function.
by Victoria Liang 3L
Fri Jan 23, 2015 8:06 pm
Forum: Phase Changes & Related Calculations
Topic: Work
Replies: 2
Views: 557

Work

Question #3 in workbook Consider a gas at an initial pressure of 5.0 atm and an initial volume of 1.0 L that undergoes a change to 2.0 atm and 4.0 L by two different pathways. The gas is at 298 K. Pathway 1: P1 = 5.0 atm P2 = 5.0 atm P3 = 2.0 atm V1 = 1.0 L V2 = 4.0 L V3 = 4.0 L Pathway 2: P1 = 5.0 ...
by Victoria Liang 3L
Tue Dec 09, 2014 8:36 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7951
Views: 1123701

Re: Chemistry Jokes

Did you hear oxygen went on a date with potassium?
It went OK.

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