Search found 34 matches
- Sun Mar 17, 2019 12:12 am
- Forum: Phase Changes & Related Calculations
- Topic: heating curve
- Replies: 3
- Views: 571
Re: heating curve
I think it’s the like the endo and exothermic activation energy graph.
- Sun Mar 17, 2019 12:11 am
- Forum: General Rate Laws
- Topic: pseudo rate laws
- Replies: 4
- Views: 677
Re: pseudo rate laws
How do you know the overall order for a pseudo reaction?
- Sun Mar 17, 2019 12:11 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: salts and buffers
- Replies: 1
- Views: 452
Re: salts and buffers
Did we even cover buffers?
- Fri Mar 08, 2019 1:01 am
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: Unique Average Rate
- Replies: 5
- Views: 588
Re: Unique Average Rate
What's an example problem of when we would have to use the unique average rate?
- Fri Mar 08, 2019 12:59 am
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: The slope of the tangent line with respect to the rate
- Replies: 3
- Views: 423
Re: The slope of the tangent line with respect to the rate
Do we have to ever take the derivative for this class or does he give us the derived formula?
- Sat Mar 02, 2019 11:17 pm
- Forum: Zero Order Reactions
- Topic: Units
- Replies: 3
- Views: 369
Re: Units
Are there units for K?
- Sat Mar 02, 2019 11:12 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Element's potentials
- Replies: 5
- Views: 638
Re: Element's potentials
The more negative the E° the stronger the reducing agent!
- Sat Mar 02, 2019 11:10 pm
- Forum: Second Order Reactions
- Topic: Pseudo-first-order reaction
- Replies: 4
- Views: 511
Re: Pseudo-first-order reaction
What’s the difference between a pseudo reaction and a reaction? Also a first and second order?
- Sat Mar 02, 2019 11:08 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: w vs wmax
- Replies: 5
- Views: 625
Re: w vs wmax
Why does it not measure expansion work?
- Fri Feb 22, 2019 10:44 am
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: Recharging Batteries [ENDORSED]
- Replies: 10
- Views: 1429
Re: Recharging Batteries [ENDORSED]
I think it's because the battery is absorbing energy. A favorable reaction releases energy.
- Fri Feb 22, 2019 10:42 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Relationship between K and G
- Replies: 3
- Views: 516
Re: Relationship between K and G
if Q<K and it's spontaneous does that mean the forward reaction is stable?
- Fri Feb 22, 2019 10:41 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Gibbs Free Energy
- Replies: 4
- Views: 479
Re: Gibbs Free Energy
How do we know if it's stable or not based on the spontaneity?
- Tue Feb 12, 2019 3:32 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: q=mCdeltaT
- Replies: 15
- Views: 8196
Re: q=mCdeltaT
I would just make sure your final answer is in the units they ask for! Don't give moles if they ask for mass and vice versa!
- Tue Feb 12, 2019 3:31 pm
- Forum: Phase Changes & Related Calculations
- Topic: reversible processes and equilibrium
- Replies: 4
- Views: 502
Re: reversible processes and equilibrium
what are the equations for reversible vs. irreversible?
- Tue Feb 12, 2019 3:28 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Irreversible vs Reversible
- Replies: 3
- Views: 369
Re: Irreversible vs Reversible
Is there reversible and irreversible for w and q? what are they dependent on?
- Sun Feb 10, 2019 10:51 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Isochoric
- Replies: 3
- Views: 435
Re: Isochoric
Have we covered this in lecture?
- Sun Feb 10, 2019 10:51 pm
- Forum: Phase Changes & Related Calculations
- Topic: Heat vs Q
- Replies: 5
- Views: 517
Re: Heat vs Q
I thought q was the change in heat? Since we can only measure the flow?
- Tue Feb 05, 2019 4:07 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Midterm [ENDORSED]
- Replies: 49
- Views: 4929
Re: Midterm [ENDORSED]
Also never had Lavelle before and am not sure how conceptual the questions will be. Or will it be more calculations? Also are midterms and finals similar to the test we've already taken?
- Thu Jan 31, 2019 11:58 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Surroundings
- Replies: 11
- Views: 949
Re: Surroundings
didn't he say something about how it may not affect surroundings? like pouring your water bottle into the ocean wouldn't greatly affect the ocean. What is the term for this?
- Thu Jan 31, 2019 11:56 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Bomb Calorimeter
- Replies: 2
- Views: 310
Re: Bomb Calorimeter
Does a bomb calorimeter have a constant pressure and volume?
- Thu Jan 31, 2019 11:53 am
- Forum: Calculating Work of Expansion
- Topic: calculation of work of irreversible and reversible expansion
- Replies: 5
- Views: 439
Re: calculation of work of irreversible and reversible expansion
What formulas do we use for reversible vs irreversible and why do we not use the same equation?
- Thu Jan 31, 2019 11:52 am
- Forum: Calculating Work of Expansion
- Topic: calculation of work of irreversible and reversible expansion
- Replies: 5
- Views: 439
Re: calculation of work of irreversible and reversible expansion
How do I know if an expansion is reversible and irreversible?
- Thu Jan 31, 2019 11:52 am
- Forum: Calculating Work of Expansion
- Topic: calculation of work of irreversible and reversible expansion
- Replies: 5
- Views: 439
Re: calculation of work of irreversible and reversible expansion
How do I know if an expansion is reversible and irreversible?
- Thu Jan 31, 2019 11:51 am
- Forum: Calculating Work of Expansion
- Topic: calculation of work of irreversible and reversible expansion
- Replies: 5
- Views: 439
Re: calculation of work of irreversible and reversible expansion
Can someone explain the differences between reversible and irreversible reactions?
- Mon Jan 28, 2019 2:59 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Cp and Cv
- Replies: 5
- Views: 851
Re: Cp and Cv
If a system has Cp can it also have a Cv? and Vice Versa?
- Fri Jan 25, 2019 12:05 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: delta H and pressure
- Replies: 2
- Views: 230
Re: delta H and pressure
If the pressure is not constant, delta H will not be accurate and should be recalculated.
- Fri Jan 25, 2019 12:00 am
- Forum: Phase Changes & Related Calculations
- Topic: State functions
- Replies: 4
- Views: 1033
Re: State functions
But doesn't only the final heat value matter? Wouldn't that make it a state function?
- Thu Jan 24, 2019 11:57 pm
- Forum: Phase Changes & Related Calculations
- Topic: Endothermic or Exothermic
- Replies: 20
- Views: 2053
Re: Endothermic or Exothermic
How do I know if it's endothermic or exothermic if there's no delta H given?
- Mon Jan 21, 2019 11:34 pm
- Forum: Phase Changes & Related Calculations
- Topic: Endothermic or Exothermic
- Replies: 20
- Views: 2053
Re: Endothermic or Exothermic
How do I know if it's endothermic or exothermic?
- Mon Jan 21, 2019 11:33 pm
- Forum: Phase Changes & Related Calculations
- Topic: How to tell acids and bases
- Replies: 8
- Views: 618
Re: How to tell acids and bases
Typically, you just look at how it would react with water. Lot's of times if it has a negative charge, it's a base and a positive charge will be an acid.
- Mon Jan 21, 2019 11:27 pm
- Forum: Ideal Gases
- Topic: kc vs kp
- Replies: 19
- Views: 3513
Re: kc vs kp
If they just say "k" do we assume Kp? Because in one problem in the textbook they used K and then it was Kc.
- Sun Jan 13, 2019 11:34 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Inert Gases
- Replies: 2
- Views: 190
Inert Gases
How do you know if a gas that is added is inert and if it will affect the equilibrium?
- Sun Jan 13, 2019 11:31 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Catalyst
- Replies: 4
- Views: 223
Re: Catalyst
Is a catalyst represented in a balanced chemical equation?
- Sun Jan 13, 2019 11:27 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Q and K considered different
- Replies: 2
- Views: 196
Q and K considered different
What distance should be between Q and K for them to be considered different? For example, if K=0.56 and Q=0.50 could they be considered the same?