Search found 19 matches

by Maggie Elgin 2A
Sat Mar 18, 2017 10:51 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Gauche vs Anti
Replies: 4
Views: 1154

Gauche vs Anti

I am having difficulty deciding when to use anti or gauche? Could someone explain the difference between the two Newman projections?
by Maggie Elgin 2A
Mon Mar 13, 2017 12:21 am
Forum: *Aldehydes
Topic: Aldehydes vs. Ketones
Replies: 2
Views: 637

Aldehydes vs. Ketones

What makes an aldehyde different from a ketone?
by Maggie Elgin 2A
Sat Mar 11, 2017 2:09 pm
Forum: *Calculations Using ΔG° = -RT ln K
Topic: Chem 14b final
Replies: 2
Views: 525

Chem 14b final

What time is the final at on sunday?
by Maggie Elgin 2A
Sun Mar 05, 2017 11:56 pm
Forum: *Cycloalkenes
Topic: Naming Cycloalkenes
Replies: 1
Views: 286

Naming Cycloalkenes

What does one do if the chain off the cycloalkane has more carbons than the cycloalkane? Do you use that as the base of the name? Thanks
by Maggie Elgin 2A
Fri Mar 03, 2017 10:09 pm
Forum: *Alkanes
Topic: Memorizing the First Ten Alkenes
Replies: 3
Views: 1407

Memorizing the First Ten Alkenes

Has anyone come up with any any nemonic devices to memorize these?
by Maggie Elgin 2A
Fri Feb 24, 2017 12:19 am
Forum: Second Order Reactions
Topic: Third Order Reactions
Replies: 5
Views: 589

Third Order Reactions

I know that third reactions are extremely uncommon but what would be example of a real life third order reaction?
by Maggie Elgin 2A
Fri Feb 24, 2017 12:03 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Slow Reaction
Replies: 11
Views: 722

Slow Reaction

Im still having a hard time determining which step is the slow reaction which I understand is the reaction rate of the overall reaction. Could someone please explain how determine which is the slow and which is the fast reaction?
by Maggie Elgin 2A
Tue Feb 21, 2017 12:49 am
Forum: General Rate Laws
Topic: Integrated Rate Law
Replies: 1
Views: 214

Integrated Rate Law

The book says that the rate law of the first order reaction is (A)t=(A)0e^-kt while the course reader says ln(A)t=-kt+ln(A)0. I have been using the one in the book and getting the same answers....Is there a difference?
by Maggie Elgin 2A
Tue Feb 21, 2017 12:43 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Arrhenius Equation
Replies: 1
Views: 276

Re: Arrhenius Equation

I too was puzzled by this but I think the idea is that Ea and A are both Arrhenius parameters which are almost independent of Temperature, though they rely on the reaction which is effected by temperature. The point they are trying to make is that if lnk against 1/t is a linear graph then it shows A...
by Maggie Elgin 2A
Mon Feb 13, 2017 12:26 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: HW 14.15 C
Replies: 1
Views: 218

Re: HW 14.15 C

The Ni(s) are used as the conducting electrode and KOH comes from the balancing of the anode.
by Maggie Elgin 2A
Mon Feb 13, 2017 12:22 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: How to treat deltaE when flipping equations?
Replies: 3
Views: 392

How to treat deltaE when flipping equations?

How does one treat E when flipping half reactions, like do we flip it as well and multiply it by the constant? Or do we treat it like an intrinsic property?
by Maggie Elgin 2A
Sun Feb 05, 2017 10:56 pm
Forum: Van't Hoff Equation
Topic: La Chatelier's Principle
Replies: 3
Views: 457

La Chatelier's Principle

How does the Van't Hoff equation related La chat. principle?
by Maggie Elgin 2A
Sun Feb 05, 2017 10:52 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Change in gibbs free energy
Replies: 1
Views: 242

Change in gibbs free energy

According to the textbook deltaG depends on the composition of the reaction so thus it varies as the reaction proceeds. What specifically do they mean by the composition of the reaction? State or amount of mols?
by Maggie Elgin 2A
Sun Jan 29, 2017 11:04 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Question 8.77
Replies: 1
Views: 250

Question 8.77

Hey. I was confused to what Kekule structures the question is referring to. Could someone define them for me and explain how that could effect molar energy?
by Maggie Elgin 2A
Sun Jan 29, 2017 11:01 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: HW: 8.11 (b)
Replies: 1
Views: 213

Re: HW: 8.11 (b)

Hello, I did not see how it was derived anywhere in the notes but it is mentioned in the textbook example to use that equation when it is reversible and the temperature does not change. I believe we just need to know how to apply that equation and understand the difference between reversible and non...
by Maggie Elgin 2A
Sun Jan 29, 2017 10:52 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Question 8.85 Part C
Replies: 1
Views: 446

Question 8.85 Part C

Could someone please explain how to do part C of this question. It asks "When the oxidation of N2 to NO was completed in a bomb calorimeter, the heat absorbed was measured as 492 J. What mass of nitrogen gas was oxidized? The equation that is given is N2 (g) +O2(g)--> 2NO(g) deltaHstandard = +1...
by Maggie Elgin 2A
Sun Jan 22, 2017 7:44 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: More detailed homework key
Replies: 1
Views: 274

More detailed homework key

I was wondering if there is somewhere we can find more detailed explanations to the homework problems? Thanks
by Maggie Elgin 2A
Sun Jan 22, 2017 7:42 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Homework Problem 8.19 and 8.21
Replies: 2
Views: 285

Homework Problem 8.19 and 8.21

Could someone please explain to me how to do these problems?
by Maggie Elgin 2A
Sun Jan 22, 2017 7:37 pm
Forum: Phase Changes & Related Calculations
Topic: Reversible vs. irreversible processes
Replies: 2
Views: 257

Re: Reversible vs. irreversible processes

A reversible process is a process that can be reversed by infinitesimally small changes in the system and without increasing entropy and the system is in equilibrium with surroundings. Compared to an irreversible process which increases entropy and isn't reversible with infinitesimally small changes.

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