Search found 32 matches
- Sat Mar 17, 2018 11:27 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Homework 14.15c : KOH in cell diagram
- Replies: 2
- Views: 506
Re: Homework 14.15c : KOH in cell diagram
Yes Ni(s) can be used as an electrode because it is a metal conductor like Pt(s) and will allow for the transfer of e-
- Sat Mar 17, 2018 11:23 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Pre equilibrium
- Replies: 5
- Views: 842
Re: Pre equilibrium
They are both acceptable.
Re: Final
Yeah we will need to know functional groups (focus on the examples professor gave in lecture)
- Sat Mar 17, 2018 11:15 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: Final
- Replies: 3
- Views: 1639
Re: Final
I think that is all that will be tested for ochem but you might want to look at the practice exam from Friday's review session for some possible questions that could be asked about ochem.
- Sun Mar 11, 2018 7:46 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: What is Molecularity?
- Replies: 9
- Views: 2495
Re: What is Molecularity?
In lecture, Lavelle defined molecularity as the number of species in an elementary step. Molecularity of a reaction can be determined by the number of reactants (unimolecular, bimolecular, and termolecular.
- Sun Mar 11, 2018 7:43 pm
- Forum: Second Order Reactions
- Topic: molecularity
- Replies: 6
- Views: 936
Re: molecularity
Yeah, you calculate molecularity by the number of reactants in a reaction.
- Sun Mar 11, 2018 7:36 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: K
- Replies: 7
- Views: 880
Re: K
I think change in temp and activation energy change the value of k for a reaction.
- Sun Mar 04, 2018 9:51 pm
- Forum: General Rate Laws
- Topic: Stoichiometry coefficients
- Replies: 3
- Views: 587
Re: Stoichiometry coefficients
The rate law cannot be determined only from the stoichiometric coefficients of a reaction.
- Sun Mar 04, 2018 9:47 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Reaction Mechanism
- Replies: 2
- Views: 344
Re: Reaction Mechanism
The book says that reaction mechanisms are used "to describe how a reaction takes place" and are a "sequence of elementary reactions or steps that chemists believe take place as reactants are transformed into products."
- Sun Mar 04, 2018 9:40 pm
- Forum: General Rate Laws
- Topic: Test #3
- Replies: 1
- Views: 283
Re: Test #3
We will be tested on 15.1-15.6 and I think that's up to problem #39
- Sun Mar 04, 2018 9:32 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Arrhenius Reaction
- Replies: 6
- Views: 825
Re: Arrhenius Reaction
It won't be tested on Test #3
- Sun Mar 04, 2018 9:29 pm
- Forum: First Order Reactions
- Topic: k
- Replies: 16
- Views: 1650
Re: k
I would keep it in seconds unless another unit is specified in the problem
- Sun Mar 04, 2018 9:27 pm
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: Quiz 3
- Replies: 6
- Views: 854
Re: Quiz 3
Yea
- Sun Feb 18, 2018 7:37 pm
- Forum: Balancing Redox Reactions
- Topic: Balancing redox rxns [ENDORSED]
- Replies: 7
- Views: 971
Re: Balancing redox rxns [ENDORSED]
^ The toolbox lists out the steps
- Sun Feb 18, 2018 7:28 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: E equations
- Replies: 3
- Views: 643
Re: E equations
One uses ln (natural log) and the other uses log base of 10
- Sun Feb 18, 2018 7:25 pm
- Forum: Balancing Redox Reactions
- Topic: Bruincast
- Replies: 4
- Views: 650
Re: Bruincast
I don't think Lavelle's class is Bruincasted
- Sun Feb 18, 2018 7:24 pm
- Forum: Balancing Redox Reactions
- Topic: Balancing Redox reactions
- Replies: 3
- Views: 533
Re: Balancing Redox reactions
You should balance the O first
- Sun Feb 18, 2018 7:22 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: State Functions
- Replies: 3
- Views: 507
Re: State Functions
State functions are important because they depend only on the initial and final and not the pathway taken. This helps us calculate enthalpy, Gibbs free energy, entropy, etc.
- Sun Feb 18, 2018 7:19 pm
- Forum: Balancing Redox Reactions
- Topic: Helpful Videos
- Replies: 4
- Views: 686
Re: Helpful Videos
I also like Tyler DeWitt's videos on redox reactions
https://www.youtube.com/watch?v=5rtJdjas-mY
https://www.youtube.com/watch?v=v5sDNmYCaqo
https://www.youtube.com/watch?v=5rtJdjas-mY
https://www.youtube.com/watch?v=v5sDNmYCaqo
- Sun Feb 04, 2018 9:44 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: state functions
- Replies: 3
- Views: 401
Re: state functions
Yeah you're right free energy is a state function
- Sun Feb 04, 2018 9:41 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Spontaneous
- Replies: 14
- Views: 1994
Re: Spontaneous
delta G has to be negative in order for a reaction to be considered spontaneous
- Sun Feb 04, 2018 9:38 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Content Question
- Replies: 4
- Views: 681
Re: Midterm Content Question
But knowing how an equation is derived may be helpful to have a deeper understanding of how to apply it or manipulate it
- Sun Feb 04, 2018 9:36 pm
- Forum: Phase Changes & Related Calculations
- Topic: Endothermic or Exothermic
- Replies: 20
- Views: 2044
Re: Endothermic or Exothermic
exothermic due to heat release
- Sun Feb 04, 2018 9:34 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Content Question
- Replies: 4
- Views: 681
Re: Midterm Content Question
I am pretty sure that we will not be asked to derive the equations but we will be asked to apply them in integrated problems
- Sun Feb 04, 2018 9:30 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: sign of q
- Replies: 7
- Views: 1557
Re: sign of q
q of system= -q of surroundings
- Thu Feb 01, 2018 10:52 am
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: unit of entropy
- Replies: 11
- Views: 1220
Re: unit of entropy
J/K or J x K^-1
- Sun Jan 21, 2018 10:32 pm
- Forum: Phase Changes & Related Calculations
- Topic: Test 1 [ENDORSED]
- Replies: 7
- Views: 966
Re: Test 1 [ENDORSED]
We also don't need to know equation 4 on page 266 for test 1
- Sun Jan 21, 2018 5:20 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Homework 8.85
- Replies: 1
- Views: 163
Homework 8.85
Will questions like 8.85 (heat output of reactions) be on Test 1 because we did not really cover it in lecture.
- Sun Jan 21, 2018 5:14 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Integrated Exercise and Applied Exercises
- Replies: 1
- Views: 315
Integrated Exercise and Applied Exercises
Are the test 1 question going to be like the integrated exercises and applied exercises of the homework or are those question too detailed?
- Fri Jan 12, 2018 9:02 pm
- Forum: Administrative Questions and Class Announcements
- Topic: HW for week 2 disc
- Replies: 5
- Views: 629
Re: HW for week 2 disc
I would do the homework problems related to what we have discussed in lecture so far which has just been material from chapter 8.
- Fri Jan 12, 2018 7:59 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Heat capacity
- Replies: 4
- Views: 361
Re: Heat capacity
Yes heat capacity is an extensive property and not an intensive property
- Fri Jan 12, 2018 7:55 pm
- Forum: Phase Changes & Related Calculations
- Topic: Endo and Exothermic Ways to Remember
- Replies: 28
- Views: 11647
Re: Endo and Exothermic Ways to Remember
I remember endothermic and exothermic by memorizing that endothermic "absorbs heat" and exothermic "loses heat".