Search found 10 matches

by Nayeon Kang 2M
Sun Mar 19, 2017 2:58 am
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Chair conformations [ENDORSED]
Replies: 2
Views: 1260

Chair conformations [ENDORSED]

For two chair conformations of Trans-1,4-dimethylcyclohexane (pg 112), why's one chair conformation more stable than the other one? Aren't they same?
by Nayeon Kang 2M
Sun Mar 12, 2017 11:51 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Butane - Gauche formation
Replies: 1
Views: 348

Butane - Gauche formation

For the Butane conformation, why's θ=120 degree has a higher energy than θ=60 degree? θ=120 degree is further than θ=60 degree, so shouldn't this be weaker in energy?
by Nayeon Kang 2M
Sun Mar 05, 2017 11:10 pm
Forum: *Alkanes
Topic: Naming
Replies: 1
Views: 383


For the organic molecules at pg 92, why can't we say it's 5-Ethyl-3-Methyl-Heptane?
by Nayeon Kang 2M
Sun Feb 26, 2017 6:48 pm
Forum: *Electrophiles
Topic: Nucleophile and Electrophile
Replies: 3
Views: 601

Nucleophile and Electrophile

In the book, it says F (Florine) is an electrophile since it wants more electron. Then does that mean Li (Lithium) and Na (sodium) are nucleophiles??
by Nayeon Kang 2M
Wed Feb 15, 2017 2:26 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: 2015 Midterm Q4&5 part 3
Replies: 1
Views: 293

2015 Midterm Q4&5 part 3

What's the answer if the problem asks to find S(surrounding) and S(universe) for the transformation when it's irreversible?
by Nayeon Kang 2M
Thu Feb 09, 2017 11:14 pm
Forum: General Rate Laws
Topic: Instantaneous rate
Replies: 1
Views: 315

Instantaneous rate

When calculating the instantaneous rate, do we always have to compare initial slope of tangent of all reaction? If yes, why??
by Nayeon Kang 2M
Sun Feb 05, 2017 7:51 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell diagram
Replies: 1
Views: 239

Cell diagram

On the cell diagram of the equation on pg.48 of the course reader, why's there a comma between Fe3+ and Fe2+ instead of | sign? We use | between Cu and Cu2+ but why not between Fe3+ and Fe2+?

by Nayeon Kang 2M
Sun Jan 29, 2017 10:34 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1 Preparation Answers
Replies: 130
Views: 17978

Re: Quiz 1 Preparation Answers

How can you solve #11? Is it right to use H=ncT here??
by Nayeon Kang 2M
Fri Jan 20, 2017 10:03 am
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: U=q+w [ENDORSED]
Replies: 1
Views: 284


In U=q+w equation, does q always has to be under constant pressure? Are there any exceptions?
by Nayeon Kang 2M
Fri Jan 20, 2017 9:55 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond enthalpy problem solve
Replies: 1
Views: 290

Bond enthalpy problem solve

When we do the bond enthalpy problems, can we always just count all the bonds of the molecules to calculate the bond enthalpy?

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