Search found 10 matches

by Rhea Kundan_2G
Sat Mar 18, 2017 9:25 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: 2014 Midterm Q7 E & F
Replies: 1
Views: 479

2014 Midterm Q7 E & F

7E says: The molecule 3-chloro-4,4,4-trihydroxy-3-methylbutanenitrile was produced. Draw the lowest energy Newman diagram for this molecule looking down the C2-C3 bond axis. and 7F is almost the same but asks about the second lowest energy conformation. Can someone explain why the lowest energy diag...
by Rhea Kundan_2G
Sat Mar 18, 2017 7:30 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Change in Entropy Formula
Replies: 1
Views: 329

Change in Entropy Formula

I know that the formula \Delta S=nCln\frac{T_{2}}{T_{1}} is given to us on the formula sheet, but would the formula \Delta S=nRln\frac{V_{2}}{V_{1}} also be given to us? Or is this something we need to know/memorize? I'm not sure if I just don't see it on our "Constants and Equations Used in Ch...
by Rhea Kundan_2G
Sun Mar 12, 2017 10:21 pm
Forum: *Ethers
Topic: Ether Naming
Replies: 1
Views: 569

Ether Naming

On page 100 of the course reader, we are given the example of: CH3CH2CHCH2CH2OCH2CH3 .............. | .............. CH3 and the resulting name is 1-ethoxy-3-methylpentane. I remember in class, Dr. Lavelle mentioned that you pick the longest continuous C-C chain because that usually also has the sub...
by Rhea Kundan_2G
Sun Mar 05, 2017 9:18 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7581
Views: 1013719

Re: Post All Chemistry Jokes Here

honestly I laughed
by Rhea Kundan_2G
Sun Feb 26, 2017 7:35 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7581
Views: 1013719

Re: Post All Chemistry Jokes Here

I love puns
by Rhea Kundan_2G
Sun Feb 19, 2017 10:50 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7581
Views: 1013719

Re: Post All Chemistry Jokes Here

I'm the pessimist
by Rhea Kundan_2G
Sun Feb 12, 2017 7:56 pm
Forum: Balancing Redox Reactions
Topic: Oxidation Numbers
Replies: 1
Views: 202

Oxidation Numbers

Can someone explain the rules for oxidation numbers/states a little bit more for me? For example, in the course reader we saw MnO_{4}^{-} , and we figure out that the total charge is -1, one O_{4} charge is -2, and the total O_{4} charge is -8 and because of these things the charge for Mn is +7. Wha...
by Rhea Kundan_2G
Sun Feb 05, 2017 6:17 pm
Forum: Balancing Redox Reactions
Topic: Homework Problem 14.17
Replies: 2
Views: 390

Re: Homework Problem 14.17

Hi! For a) The cathode half-reaction would be: MnO^{-}_{4}(aq)+ 8H^{+} (aq) + 5e^{-} \rightarrow Mn^{2+}(aq)+ 4H_{2}O (l) and the anode half-reaction would be: 5Fe^{2+} (aq) \rightarrow 5Fe^{3+} (aq)+ 5e^{-} (you can factor out the 5) Adding these two ...
by Rhea Kundan_2G
Sun Jan 29, 2017 5:53 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Confusion about K and Q and Equilibrium
Replies: 1
Views: 266

Re: Confusion about K and Q and Equilibrium

The course reader actually says: 1. ΔG° = -RT ln (K) 2. ΔG = ΔG° + RT ln (Q) The first equation is ΔG°, not ΔG. This makes sense because in the first equation, the system is at equilibrium, so ΔG = 0. Maybe this will help it make more sense: ΔG = ΔG° + RT ln (K) 0 = ΔG° + RT ln (K) - ΔG° = RT ln (K)...
by Rhea Kundan_2G
Sun Jan 15, 2017 4:07 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Standard Enthalpy of Formation Clarification
Replies: 1
Views: 172

Standard Enthalpy of Formation Clarification

I understand that to find reaction enthalpies using Hess's law or bond enthalpies, the problem you are trying to solve must give you certain information or else you can't use those methods. However, since for standard enthalpy of formation you are just looking at a table to find your information, ca...

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