Search found 12 matches

by 204381410
Sat Mar 12, 2016 8:12 pm
Forum: *Cycloalkanes
Topic: Phenol groups
Replies: 1
Views: 219

Phenol groups

Are we going to required to know phenol groups? I know they're important in organic chemistry but we never went over them in lecture.
by 204381410
Sat Mar 12, 2016 8:09 pm
Forum: *Electrophiles
Topic: General Question about Nucleophiles vs. Electrophiles
Replies: 2
Views: 704

General Question about Nucleophiles vs. Electrophiles

In quiz 3, they gave us several molecules (e.g. CH3+, OH-, CH3,Cl, CO2) and asked us to categorize them either as an electrophile or nucleophile. Other than the overall charge of the molecule, is there another way to tell whether a molecule is more electrophillic/nucleophillic?
by 204381410
Sat Mar 12, 2016 8:00 pm
Forum: General Rate Laws
Topic: Question from Quiz 2
Replies: 1
Views: 242

Question from Quiz 2

The question gives that A + B + C --> X and the rate law would be R=k[A]^2[B][C] and it asks you to find the rate constant k for the reaction given that the excess reactants concentration of A and B is [A]_o_ [B]_o_ How do you solve for k with this given. I had to leave this one blank on the quiz be...
by 204381410
Sat Mar 12, 2016 7:52 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Midterm Question
Replies: 1
Views: 216

Midterm Question

IN the midterm, question 8, the test asks what would the effect on the potential of the cell if the size of the silver electrode were doubled?

I understand that nothing would happen, but why would there be no effect on E?
by 204381410
Sun Feb 21, 2016 11:00 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7582
Views: 1014000

Re: Chemistry Jokes

In a sports relay race, a chemical kinetics specialist runs slowly, and his group loses the race.

When the chemical kinetics specialist is asked why he ran slowly, his reply was “I always wanted to be the significant rate determining step”.
by 204381410
Sun Feb 07, 2016 7:49 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: HW 14.11 Part D
Replies: 1
Views: 172

HW 14.11 Part D

In the problem, O2 and H+ are on the anode but they are being combined to form water, why is this? Typically the two molecules would exchange electrons on separate sides of the chemical reaction.
by 204381410
Fri Feb 05, 2016 12:52 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: HW 11.11
Replies: 1
Views: 187

HW 11.11

When solving the question, you should use

If represents the Gibbs Free Energy at STP, why does the solutions manual solve for at 1200K rather than 298K?
by 204381410
Sun Jan 31, 2016 9:11 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond Enthalpies
Replies: 3
Views: 341

Bond Enthalpies

What's the difference between bond enthalpies and enthalpies of formation and can you use either to solve
by 204381410
Mon Jan 18, 2016 3:54 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Enthalpy of Vaporization
Replies: 1
Views: 186

Enthalpy of Vaporization

When doing the homework problems for chapter 8 (I believe the question in the book is either 35 or 37) it asks for the Enthalpy of Vaporization. What is the formula for this. Also I noticed when doing the bomb calorimeter problems, the solutions manual uses the formula q = C sp *delta*T... why is th...
by 204381410
Mon Jan 18, 2016 12:01 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Question 8.1
Replies: 1
Views: 253

Question 8.1

Why would coffee in a thermos be considered an isolated system? In my everyday experience with thermoses, the coffee would cool if put in the fridge, and thus have a change in energy.
by 204381410
Sun Nov 29, 2015 2:17 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Lewis Structures and VSEPR
Replies: 2
Views: 279

Re: Lewis Structures and VSEPR

IMG_0276.mp4 [ 359.55 MiB | Viewed 276 times ]

by 204381410
Sat Nov 28, 2015 11:30 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lewis Structures and VSEPR
Replies: 2
Views: 279

Lewis Structures and VSEPR

Here is my video for Lewis Structures and VSEPR. Enjoy.

https://youtu.be/VVSX46ymEH8

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