Search found 11 matches

by Uma_Rajiyah_2A
Thu Mar 16, 2017 11:15 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 2016 final question 3B
Replies: 4
Views: 478

2016 final question 3B

How are we able to determine which one is the cathode and which one is the anode when we are just given the reduction values?
Thank you.
by Uma_Rajiyah_2A
Thu Mar 16, 2017 11:12 pm
Forum: General Rate Laws
Topic: Midterm 2016 question 4B
Replies: 1
Views: 286

Midterm 2016 question 4B

How are we able to determine what the rate limiting step is when we're only given the mechanisms the students create?
Thanks.
by Uma_Rajiyah_2A
Sun Mar 05, 2017 9:11 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Functional Groups
Replies: 1
Views: 314

Functional Groups

In lecture last Friday, when we were going over functional groups on pg 97 of the course reader, Dr. Lavelle said that aldehydes can be at the end of a chain but ketones cannot be. Why is this the case?

Thank you!
by Uma_Rajiyah_2A
Sun Feb 26, 2017 2:43 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Catalysts [ENDORSED]
Replies: 2
Views: 475

Catalysts [ENDORSED]

What is the difference between heterogeneous and homogeneous catalysts? How do they function differently/effect reactions differently? Is this distinction important/why does this matter?

Thank you!
by Uma_Rajiyah_2A
Mon Feb 20, 2017 4:13 pm
Forum: General Rate Laws
Topic: differential rate law vs. integrated rate law
Replies: 1
Views: 286

differential rate law vs. integrated rate law

I understand that the differential rate law is the rate vs. concentration, and the integrated rate law is the rate vs. time, but what is the purpose of having these two separate equations? What are they actually telling us about the reaction? Why are they useful?
by Uma_Rajiyah_2A
Sat Feb 11, 2017 3:09 pm
Forum: Zero Order Reactions
Topic: Zero, First, and Second Order reactions [ENDORSED]
Replies: 1
Views: 343

Zero, First, and Second Order reactions [ENDORSED]

What exactly is the purpose of classifying reactions as zero, first, or second order? What is it exactly telling us? Why is it important?
Thank you!
by Uma_Rajiyah_2A
Sat Feb 04, 2017 3:59 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Potential and Free Energy Difference
Replies: 2
Views: 203

Cell Potential and Free Energy Difference

Can someone please explain to me why/how the max cell potential is directly related to the free energy difference between the reactants and products in the cell? I am a bit confused on this. Thank you.
by Uma_Rajiyah_2A
Sat Jan 28, 2017 3:37 pm
Forum: Administrative Questions and Class Announcements
Topic: Content on Quiz 1
Replies: 4
Views: 594

Re: Content on Quiz 1

At the end of lecture on Friday, Dr. Lavelle said that everything we have covered up until that point is fair game. So I believe that is everything up to page 42 of the course reader, so basically everything on thermodynamics.

Hope this helps!
by Uma_Rajiyah_2A
Sun Jan 22, 2017 1:15 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Enthalpy Formula
Replies: 2
Views: 360

Re: Enthalpy Formula

The formula for enthalpy is H=U+PV

U stands for the internal energy of the system
P starts for pressure of the system
V stands for volume of the system
by Uma_Rajiyah_2A
Sun Jan 22, 2017 11:29 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Enthalpy vs. Entropy [ENDORSED]
Replies: 2
Views: 912

Re: Enthalpy vs. Entropy [ENDORSED]

A listed in the course reader, enthalpy is the amount of heat released or absorbed at a constant pressure (qp= ΔH). It is a state property. In other words, a change in enthalpy is equal to the heat transferred at constant pressure. H=U+PV A change in entropy, on the other hand, is equal to the heat ...

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