Search found 19 matches
- 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: 11014
Gauche vs Anti
I am having difficulty deciding when to use anti or gauche? Could someone explain the difference between the two Newman projections?
- Mon Mar 13, 2017 12:21 am
- Forum: *Aldehydes
- Topic: Aldehydes vs. Ketones
- Replies: 2
- Views: 1701
Aldehydes vs. Ketones
What makes an aldehyde different from a ketone?
- Sat Mar 11, 2017 2:09 pm
- Forum: *Calculations Using ΔG° = -RT ln K
- Topic: Chem 14b final
- Replies: 2
- Views: 1457
Chem 14b final
What time is the final at on sunday?
- Sun Mar 05, 2017 11:56 pm
- Forum: *Cycloalkenes
- Topic: Naming Cycloalkenes
- Replies: 1
- Views: 663
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
- Fri Mar 03, 2017 10:09 pm
- Forum: *Alkanes
- Topic: Memorizing the First Ten Alkenes
- Replies: 3
- Views: 13497
Memorizing the First Ten Alkenes
Has anyone come up with any any nemonic devices to memorize these?
- Fri Feb 24, 2017 12:19 am
- Forum: Second Order Reactions
- Topic: Third Order Reactions
- Replies: 5
- Views: 1559
Third Order Reactions
I know that third reactions are extremely uncommon but what would be example of a real life third order reaction?
- Fri Feb 24, 2017 12:03 am
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Slow Reaction
- Replies: 11
- Views: 1985
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?
- Tue Feb 21, 2017 12:49 am
- Forum: General Rate Laws
- Topic: Integrated Rate Law
- Replies: 1
- Views: 445
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?
- Tue Feb 21, 2017 12:43 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Arrhenius Equation
- Replies: 1
- Views: 499
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...
- 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: 432
Re: HW 14.15 C
The Ni(s) are used as the conducting electrode and KOH comes from the balancing of the anode.
- 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: 1222
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?
- Sun Feb 05, 2017 10:56 pm
- Forum: Van't Hoff Equation
- Topic: La Chatelier's Principle
- Replies: 3
- Views: 894
La Chatelier's Principle
How does the Van't Hoff equation related La chat. principle?
- Sun Feb 05, 2017 10:52 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Change in gibbs free energy
- Replies: 1
- Views: 434
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?
- Sun Jan 29, 2017 11:04 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Question 8.77
- Replies: 1
- Views: 466
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?
- Sun Jan 29, 2017 11:01 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: HW: 8.11 (b)
- Replies: 1
- Views: 406
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...
- 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: 1338
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...
- Sun Jan 22, 2017 7:44 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: More detailed homework key
- Replies: 1
- Views: 509
More detailed homework key
I was wondering if there is somewhere we can find more detailed explanations to the homework problems? Thanks
- Sun Jan 22, 2017 7:42 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Homework Problem 8.19 and 8.21
- Replies: 2
- Views: 639
Homework Problem 8.19 and 8.21
Could someone please explain to me how to do these problems?
- Sun Jan 22, 2017 7:37 pm
- Forum: Phase Changes & Related Calculations
- Topic: Reversible vs. irreversible processes
- Replies: 2
- Views: 596
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.