Search found 12 matches

by Kevin Pham 2G
Sat Mar 18, 2017 3:48 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Final 2014 #7E and 7F
Replies: 1
Views: 489

Final 2014 #7E and 7F

For 7E, I understand why C(OH)3 is opposite CN in the Newmann projection. But for 7F, why is Cl instead of CH3 opposite CN in the Newmann projection?
by Kevin Pham 2G
Sun Mar 12, 2017 8:54 pm
Forum: *Alkenes
Topic: Alkenes and Alkynes?
Replies: 2
Views: 296

Re: Alkenes and Alkynes?

I was under the impression that alkenes were in the quiz 3, since they are integral to electrophilic addition? check with your TA. Alkynes and cycloalkenes should not be Thank you! Alkenes did appear on Quiz 3 for electrophilic addition, but we did not have to name or draw them ourselves (which was...
by Kevin Pham 2G
Sun Mar 12, 2017 8:44 pm
Forum: First Order Reactions
Topic: Quiz 2 #3
Replies: 1
Views: 323

Quiz 2 #3

#3. "Consider the following reaction mechanism Step 1: (CH3)3C-Br ->k1 <-k1' (CH3)3C+ +Br- Step 2: (CH3)3C+ + OH- ->k2 (CH3)3C-OH Given that k1 << k2" I know that Step 1 is the rate limiting step b/c the rate constant of Step 1 is much smaller than that of Step 2, hence Step 1 is the slow ...
by Kevin Pham 2G
Sun Mar 05, 2017 8:41 pm
Forum: *Alkenes
Topic: Alkenes and Alkynes?
Replies: 2
Views: 296

Alkenes and Alkynes?

We do not need to study alkenes, cycloalkenes, and alkynes for Quiz 3, but since they are included in the HW, will they appear on the final?
by Kevin Pham 2G
Sun Feb 26, 2017 8:32 pm
Forum: Administrative Questions and Class Announcements
Topic: 14CL
Replies: 6
Views: 826

Re: 14CL

Hi, Does anyone know whether 14CL can be taken at the same time as 14C or whether it is reccommended to be taken after the completion of 14C? Are you currently taking 14B and 14BL together this quarter? I think it is recommended to take 14C and 14CL not concurrently b/c the course material may over...
by Kevin Pham 2G
Sun Feb 26, 2017 8:27 pm
Forum: Administrative Questions and Class Announcements
Topic: 2/24/17 Bruincast
Replies: 19
Views: 2130

Re: 2/24/17 Bruincast

EllisJang2O wrote:Lecture 2's audio is correct for 2/24/17.


Thank you!
by Kevin Pham 2G
Sun Feb 19, 2017 9:00 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Homework 15.79
Replies: 4
Views: 402

Re: Homework 15.79

Chem_Mod wrote:Thermodynamic control means usually the activation barrier is low, kinetic control is when activation barrier is high.


Can you explain this in more detail please?
by Kevin Pham 2G
Sun Feb 12, 2017 10:36 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: 14.33
Replies: 3
Views: 372

Re: 14.33

When the question asks to identify whether Tl^+ will disproportionate in an aqueous solution, the answer is no because Gibss free energy is positive (Given: +215kj/mol) and not spontaneous, but also K <1, right? Is this a right reasoning? I know that there is also an equation that related Gibbs Fre...
by Kevin Pham 2G
Sun Feb 05, 2017 7:56 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Writing Cell Diagram?
Replies: 2
Views: 332

Writing Cell Diagram?

Does the order in which we write the reactants and products of the anode and cathode in the cell diagram matter?
by Kevin Pham 2G
Sun Jan 29, 2017 8:51 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7567
Views: 1011010

Re: Post All Chemistry Jokes Here

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by Kevin Pham 2G
Sun Jan 22, 2017 8:17 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Chapter 8 Question 49
Replies: 1
Views: 221

Re: Chapter 8 Question 49

According to the textbook, "most thermochemical data are reported for 298.15 K (25 C)", so I think it is safe to assume that the temperature convention for our HW problems is 298.15 K (25 C), unless otherwise stated.
by Kevin Pham 2G
Sat Jan 14, 2017 8:59 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Difference between Bond Enthalpies & Standard Enthalpies of Formation
Replies: 1
Views: 171

Difference between Bond Enthalpies & Standard Enthalpies of Formation

This question may have been asked, but I am new to Chemistry Community and am overwhelmed by all the posts on the forums. May someone please explain the difference between bond enthalpies and standard enthalpies of formation ? For example, why is the bond enthalpy for F2 equal to 158 kJ/mol, but the...

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