Search found 33 matches

by Jason Ye 2I
Sat Mar 16, 2019 1:33 am
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: delta U
Replies: 4
Views: 216

Re: delta U

Yes
by Jason Ye 2I
Fri Mar 08, 2019 2:20 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: how much of catalyst do we need to know? [ENDORSED]
Replies: 4
Views: 299

Re: how much of catalyst do we need to know? [ENDORSED]

Just that they speed up reaction rate by lowering activation energy
by Jason Ye 2I
Fri Mar 08, 2019 2:19 pm
Forum: Zero Order Reactions
Topic: initial concentration
Replies: 6
Views: 120

Re: initial concentration

The reactant concentrations just dont affect rate.
by Jason Ye 2I
Fri Mar 08, 2019 2:18 pm
Forum: Second Order Reactions
Topic: Final
Replies: 30
Views: 481

Re: Final

It is cumulative and includes all material we learned
by Jason Ye 2I
Fri Mar 08, 2019 2:18 pm
Forum: *Enzyme Kinetics
Topic: Enzymes
Replies: 8
Views: 579

Re: Enzymes

Enzymes have activation sites that fit substrates in and make reactions faster.
by Jason Ye 2I
Fri Mar 08, 2019 2:17 pm
Forum: Zero Order Reactions
Topic: Reactions Orders
Replies: 2
Views: 64

Re: Reactions Orders

We might have to solve for the order for certain questions.
by Jason Ye 2I
Fri Mar 08, 2019 2:16 pm
Forum: General Rate Laws
Topic: Rate Laws
Replies: 8
Views: 120

Re: Rate Laws

They will give you derivations on the test i believe.
by Jason Ye 2I
Mon Feb 25, 2019 2:01 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Meaning of E
Replies: 3
Views: 82

Re: Meaning of E

One is standard and obtained experimentally. One is something you get from circumstance and compare to the standard. like Q vs K
by Jason Ye 2I
Mon Feb 25, 2019 1:59 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Anode and Cathode
Replies: 6
Views: 73

Re: Anode and Cathode

anode is oxidized and contributes electrons whereas cathode is reduced
by Jason Ye 2I
Thu Feb 21, 2019 12:20 am
Forum: Calculating Work of Expansion
Topic: Expansion Against a Vacuum
Replies: 4
Views: 108

Re: Expansion Against a Vacuum

Yes that is an irreversible system.
by Jason Ye 2I
Thu Feb 21, 2019 12:20 am
Forum: Calculating Work of Expansion
Topic: Work
Replies: 8
Views: 288

Re: Work

Look at the given units and variables
by Jason Ye 2I
Thu Feb 21, 2019 12:19 am
Forum: Calculating Work of Expansion
Topic: expansion
Replies: 2
Views: 65

Re: expansion

If energy is expended for expansion or as heat
by Jason Ye 2I
Fri Feb 15, 2019 2:05 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: 3/2R vs 5/2R
Replies: 8
Views: 172

Re: 3/2R vs 5/2R

When it is constant pressure or constant volume. Or based on the shape of the molecules.
by Jason Ye 2I
Fri Feb 15, 2019 2:05 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Calculating Delta S with a change in temperature
Replies: 5
Views: 111

Re: Calculating Delta S with a change in temperature

You can change the variables to include temperature its just that temperature is inverse.
by Jason Ye 2I
Fri Feb 15, 2019 2:04 pm
Forum: Calculating Work of Expansion
Topic: S=0
Replies: 12
Views: 414

Re: S=0

Entropy is equal to zero in a perfect crystal at T= 0K
by Jason Ye 2I
Tue Feb 12, 2019 2:48 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Heat Capacity
Replies: 4
Views: 88

Re: Heat Capacity

Yes that is convertible and equivalent
by Jason Ye 2I
Tue Feb 12, 2019 2:47 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: hess law equations
Replies: 3
Views: 90

Re: hess law equations

The equations will most likely be given on the exam.
by Jason Ye 2I
Tue Feb 12, 2019 2:46 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Example 8.3 sixth edition
Replies: 3
Views: 86

Re: Example 8.3 sixth edition

The changes in kelvin are the same as the changes in celsius.
by Jason Ye 2I
Mon Jan 28, 2019 3:52 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Adiabatic and diathermic walls
Replies: 4
Views: 70

Re: Adiabatic and diathermic walls

Its more conceptual than something which we would need to know how to calculate
by Jason Ye 2I
Mon Jan 28, 2019 3:51 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Cp and Cv
Replies: 5
Views: 298

Re: Cp and Cv

They are used for different conditions and questions
by Jason Ye 2I
Mon Jan 28, 2019 3:50 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Hess's Law
Replies: 3
Views: 82

Re: Hess's Law

You can add the reaction equations together along with their values of enthalpy
by Jason Ye 2I
Mon Jan 28, 2019 3:49 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Neutralization reactions
Replies: 6
Views: 85

Re: Neutralization reactions

No it can be endothermic in certain situations
by Jason Ye 2I
Mon Jan 28, 2019 3:48 pm
Forum: Phase Changes & Related Calculations
Topic: Enthalpy signs
Replies: 13
Views: 164

Re: Enthalpy signs

Its positive when the reaction is endothermic and negative when it is exothermic
by Jason Ye 2I
Mon Jan 28, 2019 3:48 pm
Forum: Phase Changes & Related Calculations
Topic: Standard entalpy of formation
Replies: 6
Views: 95

Re: Standard entalpy of formation

Chemicals in their most stable form in which they cant be broken down anymore have a standard enthalpy of formation of 0
by Jason Ye 2I
Mon Jan 21, 2019 4:39 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Net ionic equation
Replies: 2
Views: 32

Re: Net ionic equation

Yeah just cancel out all the ions and then recalculate the equation.
by Jason Ye 2I
Mon Jan 21, 2019 4:29 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Q and K
Replies: 10
Views: 188

Re: Q and K

Q is like a hypothetical reaction and K is an established equilibrium constant
by Jason Ye 2I
Mon Jan 21, 2019 4:27 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kp vs Kc
Replies: 7
Views: 101

Re: Kp vs Kc

Kp applies to pressure and Kc applies to concentration
by Jason Ye 2I
Mon Jan 21, 2019 4:26 pm
Forum: Ideal Gases
Topic: 5% rule
Replies: 12
Views: 286

Re: 5% rule

I think each component of X should comply to the 5% rule.
by Jason Ye 2I
Sun Jan 13, 2019 2:48 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kc and Kp
Replies: 5
Views: 70

Re: Kc and Kp

You use Kp for gases and when pressure can be involved and Kc for aqueous solutions where mostly only concentration is concerned.
by Jason Ye 2I
Sun Jan 13, 2019 2:47 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: True or False regarding reaction mixture [ENDORSED]
Replies: 10
Views: 134

Re: True or False regarding reaction mixture [ENDORSED]

Yeah the concentrations stay the same because the forward and reverse occur at the same rate.
by Jason Ye 2I
Sun Jan 13, 2019 2:44 pm
Forum: Ideal Gases
Topic: Denoting brackets/parentheses
Replies: 9
Views: 127

Re: Denoting brackets/parentheses

Brackets are for concentration and parentheses are for states of matter and other things within chemical notation I think.
by Jason Ye 2I
Sun Jan 13, 2019 2:37 pm
Forum: Ideal Gases
Topic: Denoting brackets/parentheses
Replies: 9
Views: 127

Re: Denoting brackets/parentheses

Brackets are for concentration and parentheses are for states of matter and other things within chemical notation I think.

Go to advanced search