Search found 30 matches

by Danielle Hoekstra 1C
Sat Mar 16, 2019 9:46 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Homework problem 7D1
Replies: 5
Views: 33

Re: Homework problem 7D1

I believe we have to memorize it.
by Danielle Hoekstra 1C
Sat Mar 16, 2019 9:44 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Catalysts
Replies: 2
Views: 14

Re: Catalysts

A homogeneous catalyst is a catalyst of the same phase and a heterogeneous catalyst is a catalyst of a different phase.
by Danielle Hoekstra 1C
Sat Mar 16, 2019 9:44 pm
Forum: Ideal Gases
Topic: Nitrogen gas
Replies: 2
Views: 17

Re: Nitrogen gas

Yes
by Danielle Hoekstra 1C
Sat Mar 16, 2019 9:33 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Cv or Cp
Replies: 3
Views: 23

Re: Cv or Cp

We use Cv when at constant volume and Cp at constant pressure.
by Danielle Hoekstra 1C
Sat Mar 16, 2019 9:29 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Isometric/Isochoric
Replies: 10
Views: 55

Re: Isometric/Isochoric

Rogelio Bazan 1D wrote:
Danielle Hoekstra 1C wrote:Is isochoic another way to say a closed system? Are they interchangeable?


Please, someone, correct me if I am wrong, but I think that isochoric is the same thing as Isometric. As in a closed system.


thanks!
by Danielle Hoekstra 1C
Sat Mar 16, 2019 9:27 pm
Forum: Second Order Reactions
Topic: units
Replies: 2
Views: 10

Re: units

1/Msec
by Danielle Hoekstra 1C
Sat Mar 16, 2019 9:26 pm
Forum: First Order Reactions
Topic: units
Replies: 3
Views: 13

Re: units

1/sec
by Danielle Hoekstra 1C
Sat Mar 16, 2019 9:23 pm
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 200
Views: 40727

Re: Saying Thank You to Dr. Lavelle

Dear Dr. Lavelle,

Just wanted to say thank you for all of your resources both online and in-person learning sessions. I really enjoyed this class!

Thanks!
by Danielle Hoekstra 1C
Sat Mar 16, 2019 9:21 pm
Forum: General Rate Laws
Topic: rate of consumption
Replies: 2
Views: 13

Re: rate of consumption

Here is a website I used to help me understand this:

https://chemistry.stackexchange.com/que ... e-negative
by Danielle Hoekstra 1C
Sat Mar 16, 2019 9:15 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Isometric/Isochoric
Replies: 10
Views: 55

Re: Isometric/Isochoric

Is isochoic another way to say a closed system? Are they interchangeable?
by Danielle Hoekstra 1C
Sat Mar 16, 2019 9:13 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Ecell Always Positive
Replies: 3
Views: 13

Re: Ecell Always Positive

Because the E°cell value of the cathode is positive and anode is negative, the Ecell will be positive as it is equal to the cathode minus the negative anode.
by Danielle Hoekstra 1C
Sat Mar 16, 2019 9:02 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Conjugate Base and Acid
Replies: 4
Views: 25

Re: Conjugate Base and Acid

A strong acid has a weak conjugate base just as a strong base has a weak conjugate acid.
by Danielle Hoekstra 1C
Sat Mar 16, 2019 8:57 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Nernst Equation
Replies: 3
Views: 14

Re: Nernst Equation

the Nernst equation is Useful when trying to calculate the cell potential (Ecell)
by Danielle Hoekstra 1C
Sat Mar 16, 2019 8:51 pm
Forum: General Science Questions
Topic: Questions on Final
Replies: 2
Views: 36

Re: Questions on Final

I’m not sure exactly but in class he said to expect something similar to the midterm.
by Danielle Hoekstra 1C
Sat Mar 16, 2019 7:36 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Relation between Q and Gibbs Free Energy
Replies: 4
Views: 13

Re: Relation between Q and Gibbs Free Energy

Artin Allahverdian 2H wrote:To clarify if Q>K the reaction would want to shift in the reverse way to make more reactants in order to reach K. Since this will make the reverse rxn more favorable than the forward rxn, the forward rxn will not be spontaneous, and thus, delta G is 0.


That’s very helpful! Thanks again
by Danielle Hoekstra 1C
Sat Mar 16, 2019 7:33 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Relation between Q and Gibbs Free Energy
Replies: 4
Views: 13

Re: Relation between Q and Gibbs Free Energy

Artin Allahverdian 2H wrote:Greater than 0 because it will be non spontaneous


Thanks!
by Danielle Hoekstra 1C
Sat Mar 16, 2019 7:31 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Relation between Q and Gibbs Free Energy
Replies: 4
Views: 13

Relation between Q and Gibbs Free Energy

If the reaction quotient (Q) is greater than the equilibrium constant what does that indicate for Gibbs free energy?
by Danielle Hoekstra 1C
Sat Mar 16, 2019 7:26 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: 7E3 7th edition
Replies: 2
Views: 16

Re: 7E3 7th edition

7E.4 The presence of a catalyst provides a reaction pathway in which the activation energy of a certain reaction is reduced from 125 kJ/mol to 75 kJ/mol. a) by what factor does the rate of the reaction increase at 298K, all other factors being equal? b) by what factor would the rate change if the re...
by Danielle Hoekstra 1C
Sat Mar 16, 2019 7:23 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: 7E3 7th edition
Replies: 2
Views: 16

7E3 7th edition

How do we do this problem? The solution manual is misleading regarding the substitution of Ea.
by Danielle Hoekstra 1C
Wed Mar 13, 2019 11:01 am
Forum: Student Social/Study Group
Topic: Studying for the Final
Replies: 25
Views: 220

Re: Studying for the Final

Doing lots of practice problems
by Danielle Hoekstra 1C
Wed Mar 13, 2019 10:59 am
Forum: Student Social/Study Group
Topic: Equations Sheet
Replies: 4
Views: 59

Re: Equations Sheet

Nope! It’s the same equations sheet we have been supplied for the tests.
by Danielle Hoekstra 1C
Wed Mar 13, 2019 10:58 am
Forum: Student Social/Study Group
Topic: Final
Replies: 5
Views: 58

Re: Final

Information on the review sessions is located on Lavelles Website, same place where he posted midterm information! :)
by Danielle Hoekstra 1C
Mon Feb 25, 2019 10:01 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 788982

Re: Post All Chemistry Jokes Here

I would tell another chemistry joke, but all the good ones Argon
by Danielle Hoekstra 1C
Mon Feb 25, 2019 9:58 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 788982

Re: Post All Chemistry Jokes Here

Old chemists never die, they just stop reacting.
by Danielle Hoekstra 1C
Mon Feb 25, 2019 9:56 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Reducing agent/oxidizing agent
Replies: 5
Views: 32

Re: Reducing agent/oxidizing agent

The anode is the electrode that electricity flows into. Cathode is the electrode where the electricity flows out of. An anode is positive and a cathode is negative
by Danielle Hoekstra 1C
Mon Feb 25, 2019 9:51 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Test 2
Replies: 4
Views: 71

Re: Test 2

Balancing redox reactions, cell potential, electrical work and how it relates to free energy etc... Material covered in week 6 and 7 up to (but not including) Nernst equation.

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