Search found 30 matches

by Ashley Bouma 1F
Tue Mar 12, 2019 2:10 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Energies
Replies: 2
Views: 36

Energies

What is the difference between free energy of activation and activation energy?
by Ashley Bouma 1F
Mon Mar 11, 2019 12:40 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: pre-equilibrium
Replies: 1
Views: 30

pre-equilibrium

I just wanted to double check that we are only responsible for the pre-equilibrium approach and not the steady-state approach.
by Ashley Bouma 1F
Mon Mar 11, 2019 12:37 pm
Forum: Student Social/Study Group
Topic: Review session
Replies: 5
Views: 220

Review session

Is Lyndon having his normal session tonight or will he only be holding the review one on Saturday?
by Ashley Bouma 1F
Thu Mar 07, 2019 5:47 pm
Forum: Zero Order Reactions
Topic: plots
Replies: 1
Views: 48

plots

Why is it that zero order and first order reactions have a negative slope, but second order reactions don't?
by Ashley Bouma 1F
Tue Mar 05, 2019 8:15 pm
Forum: Zero Order Reactions
Topic: Order Reactions
Replies: 4
Views: 76

Order Reactions

I just wanted to clarify, are we only responsible for zero, first, and second order reactions?
by Ashley Bouma 1F
Tue Mar 05, 2019 11:49 am
Forum: General Rate Laws
Topic: Orders
Replies: 3
Views: 58

Orders

What is the significance/importance of finding the order of a reaction? What does it tell us?
by Ashley Bouma 1F
Mon Feb 25, 2019 1:10 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 2 Topics
Replies: 2
Views: 53

Re: Test 2 Topics

Yes, that is what Dr. Lavelle said in lecture
by Ashley Bouma 1F
Mon Feb 25, 2019 1:10 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Calculations [ENDORSED]
Replies: 3
Views: 57

Calculations [ENDORSED]

Out of delta G, delta H, and delta S, in which calculation do you not include elements in their most stable form?
by Ashley Bouma 1F
Mon Feb 25, 2019 1:06 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Anode and Cathode
Replies: 6
Views: 61

Anode and Cathode

If you are given a reaction how can you tell which one is the anode and which one is the cathode?
by Ashley Bouma 1F
Thu Feb 21, 2019 10:15 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: electrodes
Replies: 1
Views: 30

electrodes

Could someone explain what cell potential/potential differences between electrodes means?
by Ashley Bouma 1F
Thu Feb 21, 2019 9:55 pm
Forum: Calculating Work of Expansion
Topic: Nonexpansion work vs expansion work
Replies: 3
Views: 121

Re: Nonexpansion work vs expansion work

expansion work means there was work done in order to change the volume/pressure of something so you would use w=-PdeltaV, and non-expansion work doesn't involve a change in volume like motional or electrical work in which you use Gibbs free energy
by Ashley Bouma 1F
Thu Feb 21, 2019 4:55 pm
Forum: Van't Hoff Equation
Topic: Test 2
Replies: 3
Views: 153

Test 2

I was wondering if Gibbs free energy and the Van't Hoff equation were the only topics from thermo that we will be tested on for test 2?
by Ashley Bouma 1F
Thu Feb 14, 2019 3:26 pm
Forum: Student Social/Study Group
Topic: workshop
Replies: 3
Views: 97

workshop

Does anyone know if Lyndon will have his normal workshop on Monday even though it's a holiday?
by Ashley Bouma 1F
Thu Feb 14, 2019 3:12 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: gibbs free energy
Replies: 10
Views: 124

gibbs free energy

I was wondering how the change in gibbs free energy relates to the spontaneity of a reaction?
by Ashley Bouma 1F
Tue Feb 12, 2019 7:52 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Extensive vs Intensive
Replies: 1
Views: 39

Extensive vs Intensive

Can someone please explain why heat capacity is an extensive property and specific heat capacity and molar heat capacity are intensive properties?
by Ashley Bouma 1F
Fri Feb 08, 2019 11:26 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Molar entropy
Replies: 2
Views: 47

Molar entropy

How do you decide which diatomic molecule has a higher molar entropy at the same temp? For example HBr or HF?
by Ashley Bouma 1F
Wed Feb 06, 2019 9:05 am
Forum: Phase Changes & Related Calculations
Topic: C (gr) ?
Replies: 2
Views: 48

Re: C (gr) ?

I believe that the book said that C(gr) was an abbreviation for graphite
by Ashley Bouma 1F
Wed Feb 06, 2019 9:02 am
Forum: Calculating Work of Expansion
Topic: Isothermal Expansions
Replies: 3
Views: 58

Isothermal Expansions

Are isothermal expansions reversible or irreversible or can they be both, and why?
by Ashley Bouma 1F
Sat Feb 02, 2019 3:02 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Seventh edition ? 4C.13
Replies: 1
Views: 61

Seventh edition ? 4C.13

An ice cube of mass 50.0g at 0.0 degrees C is added to a glass containing 400.0 g of water at 45.0 degrees C. What is the final temp of the of the system (see tables 4A.2 and 4C.1)? Assume that no heat is lost to the surroundings.
by Ashley Bouma 1F
Sat Feb 02, 2019 2:57 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Seventh Edition ? 4C.3
Replies: 1
Views: 52

Seventh Edition ? 4C.3

Calculate the final temp and the change in enthalpy when 765J of energy is transferred as heat to .820 mol Kr(g) at 298K and 1.00 atm at constant pressure. How should I approach this problem?
by Ashley Bouma 1F
Tue Jan 29, 2019 9:51 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: 7th edition 4C.1
Replies: 1
Views: 39

Re: 7th edition 4C.1

NO2 would have a higher heat capacity because heat capacity increases with molecular complexity. The more atoms present in a molecule allows for there to be more possible bonds that have vibrations which absorb added energy.
by Ashley Bouma 1F
Fri Jan 25, 2019 5:06 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Seventh Edition ? 4A.9
Replies: 1
Views: 27

Seventh Edition ? 4A.9

Can someone please explain how to approach question 4A.9 and what I should infer from it saying that no energy is lost to the surroundings. "A piece of copper of mass 20.0g at 100.0 degrees C is placed in a vessel of negligible heat capacity but containing 50.7 g of water at 22.0 degrees C. Cal...
by Ashley Bouma 1F
Thu Jan 24, 2019 11:17 am
Forum: Amphoteric Compounds
Topic: amphoteric v amphiprotic
Replies: 5
Views: 264

Re: amphoteric v amphiprotic

Amphiprotic refers to the ability to donate or accept protons whereas amphoteric refers to the ability to act as an acid or a base. Something that is amphoteric is always amphiprotic, but something that is amphiprotic is not always amphoteric.
by Ashley Bouma 1F
Thu Jan 24, 2019 11:09 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Test 1
Replies: 8
Views: 159

Re: Test 1

It is best to memorize the lists of strong acids and bases because once you know those whatever else you are given will be weak acids or bases. If you don't memorize the list you can look at the Ka value and if it is a high Ka that means the acid highly dissociates and therefore it is a strong acid.
by Ashley Bouma 1F
Thu Jan 17, 2019 9:40 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Kb memorization? 7th ed. 6D.5
Replies: 1
Views: 96

Re: Kb memorization? 7th ed. 6D.5

They got those values from table 6C.1 which is Ka and pKa acidity constants and table 6C.2 which is Kb and pKb basicity constants on pages 461 and 462 in the seventh edition. I do not think that we need to have these memorized.
by Ashley Bouma 1F
Thu Jan 17, 2019 9:34 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Quadratic equation and ICE box
Replies: 3
Views: 46

Re: Quadratic equation and ICE box

The quadratic equation will give you the most accurate answer but the short cut is used when you are given a K value that is less than 10^-3 and this is because that number is so small that it will make no difference so you can disregard the x on the bottom of the fraction. To check this you can sol...
by Ashley Bouma 1F
Tue Jan 15, 2019 1:55 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Part 4 Post-Module Question
Replies: 4
Views: 51

Part 4 Post-Module Question

I am confused on question 17 in the part 4 post module, could anyone please explain? Determine the shift in equilibrium, if any, which will occur for the following reactions when the temperature is increased a) Photosynthesis: 6 CO2 (g) + 6 H2O (l) ⇌ C6H12O6(s) + 6 O2 (g) delta H° = +2802 kJ.mol-1 b...
by Ashley Bouma 1F
Fri Jan 11, 2019 11:03 pm
Forum: Ideal Gases
Topic: Notation [ENDORSED]
Replies: 5
Views: 94

Re: Notation [ENDORSED]

Brackets denote concentration and partial pressure is not measured by concentration so I would assume that parentheses would be best when you are dealing with partial pressures.
by Ashley Bouma 1F
Fri Jan 11, 2019 8:57 am
Forum: General Science Questions
Topic: Week 1 Homework
Replies: 5
Views: 109

Re: Week 1 Homework

It is due this Friday in lecture
by Ashley Bouma 1F
Thu Jan 10, 2019 11:08 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K=1
Replies: 5
Views: 76

Re: K=1

When K equals one the concentration of products and reactants are equal, which is very rare. The only significance of K equalling one is that we can use it as a marker and say a K above one favors products and a K below one favors reactants

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