Search found 11 matches

by vannahyazon 1L
Thu Mar 16, 2017 10:43 am
Forum: Administrative Questions and Class Announcements
Topic: Lecture on Friday
Replies: 2
Views: 309

Re: Lecture on Friday

No, there isn't, but if you have a Friday discussion, you still have that class! Also! On Friday, there's still these review session: 4-5:30pm, Dr. Lavelle (Winter 2016 Final. Since it is ~3hr final I will likely cover the first half in my 90 minute review with student Q&A, discussion, etc.) 5:3...
by vannahyazon 1L
Thu Mar 16, 2017 10:39 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 883172

Re: Post All Chemistry Jokes Here

I wonder if anyone in the UCLA Chem Community can confirm.

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by vannahyazon 1L
Thu Mar 16, 2017 10:34 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 883172

Re: Post All Chemistry Jokes Here

FOR ALL THOSE WHO'VE TAKEN 14BL/WILL TAKE IT

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by vannahyazon 1L
Thu Mar 16, 2017 10:27 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz 3 Winter 2017
Replies: 183
Views: 15481

Re: Quiz 3 Winter 2017

Chris_Rudewicz_3H wrote:We still get to drop our lowest quiz score, right?


Your lowest quiz score will be replaced by your highest quiz score.

So your grade for quizzes should be:

1. HIGHEST SCORE
2. HIGHEST SCORE
3. MIDDLE SCORE
by vannahyazon 1L
Thu Mar 16, 2017 10:22 am
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 202
Views: 63655

Re: Saying Thank You to Dr. Lavelle

Dr. Lavelle, Thank you for being so advocating for students. No other professor has so many office hours from himself, TA's, UA's, and PLF's. Not to mention you have Chemistry Community for anything as well. You have so many resources, and you give students no excuse. That's amazing. You truly care ...
by vannahyazon 1L
Thu Mar 16, 2017 10:15 am
Forum: Administrative Questions and Class Announcements
Topic: Final Exam Details and Review Sessions Winter 2017
Replies: 114
Views: 13236

Re: Final Exam Details and Review Sessions Winter 2017

204639491 wrote:Will any of the Review Sessions be Bruincasted?



2 students from lecture 1 will be recording and posting on chemistry community (:
by vannahyazon 1L
Thu Mar 16, 2017 10:10 am
Forum: *Nucleophilic Substitution
Topic: SN2
Replies: 2
Views: 522

Re: SN2

Like noted above, SN2 is a single step mechanism. So if you create a one step mechanism, and the starting molecule does not look like the end molecule after that first step, then it will be electrophilic addition, because there are more steps to match the starting molecule and the end molecule. As n...
by vannahyazon 1L
Thu Mar 16, 2017 10:05 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Catalyst vs. Intermediate Species
Replies: 2
Views: 553

Re: Catalyst vs. Intermediate Species

If we're describing catalysts and intermediates in free energy diagrams, The catalyst is not specifically drawn in the diagram, but it will decrease the activation energy. So you will draw your deltaG curve smaller than before the catalyst was put in. Intermediates are represented by the valley in b...
by vannahyazon 1L
Thu Mar 16, 2017 9:53 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Arrhenius Equation
Replies: 2
Views: 408

Re: Arrhenius Equation

I give a second confirmation, you can use that equation as well, and many of the PLF's teach the Arrhenius Equation this way, so like the first replier stated, it's not the fault of the equations. Although, my TA did mention before we took the quiz, it's always more favorable to use the equations th...
by vannahyazon 1L
Thu Mar 16, 2017 9:50 am
Forum: Method of Initial Rates (To Determine n and k)
Topic: Two Step Reactions
Replies: 3
Views: 456

Re: Two Step Reactions

Yes, the slow step takes more energy to be carried out than the fast step. If you think about the 2 step free energy diagram that we did on Quiz 3, if k1 > k2 this means that the rate is faster for k1. If the rate is faster, the activation energy is lower (deltaGdoubledagger1). But k2 is slower, so ...
by vannahyazon 1L
Sun Jan 22, 2017 4:56 pm
Forum: Phase Changes & Related Calculations
Topic: Quiz Prep #1 question #8
Replies: 2
Views: 408

Re: Quiz Prep #1 question #8

This problem involves using the Gibbs equation, and when you plug in the values it ends up always positive.

So yes, the answer is no temperature cause that would never happen.

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