Search found 10 matches
- Sun Mar 19, 2017 2:58 am
- Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
- Topic: Chair conformations [ENDORSED]
- Replies: 2
- Views: 2599
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?
- 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: 480
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?
Naming
For the organic molecules at pg 92, why can't we say it's 5-Ethyl-3-Methyl-Heptane?
- Sun Feb 26, 2017 6:48 pm
- Forum: *Electrophiles
- Topic: Nucleophile and Electrophile
- Replies: 3
- Views: 1208
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??
- 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: 413
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?
- Thu Feb 09, 2017 11:14 pm
- Forum: General Rate Laws
- Topic: Instantaneous rate
- Replies: 1
- Views: 393
Instantaneous rate
When calculating the instantaneous rate, do we always have to compare initial slope of tangent of all reaction? If yes, why??
- Sun Feb 05, 2017 7:51 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell diagram
- Replies: 1
- Views: 359
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+?
Thanks
Thanks
- Sun Jan 29, 2017 10:34 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 1 Preparation Answers
- Replies: 130
- Views: 25684
Re: Quiz 1 Preparation Answers
How can you solve #11? Is it right to use H=ncT here??
- Fri Jan 20, 2017 10:03 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: U=q+w [ENDORSED]
- Replies: 1
- Views: 514
U=q+w [ENDORSED]
In U=q+w equation, does q always has to be under constant pressure? Are there any exceptions?
- 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: 409
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?