Search found 29 matches

by Katie Blann 1E
Sat Mar 17, 2018 8:38 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 785965

Re: Post All Chemistry Jokes Here

Chemistry jokes are sodium funny!
I slapped my neon on that one!
by Katie Blann 1E
Mon Mar 12, 2018 6:47 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Problem 15.61
Replies: 5
Views: 151

Re: Problem 15.61

I am also confused about where this equation came from can anyone elaborate on this more?
by Katie Blann 1E
Mon Mar 12, 2018 6:22 pm
Forum: General Rate Laws
Topic: HW 15.55
Replies: 1
Views: 47

HW 15.55

Why is part A of this problem true?
by Katie Blann 1E
Sun Mar 11, 2018 11:35 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 785965

Re: Post All Chemistry Jokes Here

Um ... the universal symbol for confusion
by Katie Blann 1E
Sun Mar 11, 2018 2:11 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: HW 15.45
Replies: 2
Views: 79

HW 15.45

Is AB the intermediate just because it is formed in one reaction and then consumed in the other? There is still some form of it in step two products (A2B) so is it not completely consumed?
by Katie Blann 1E
Sun Mar 11, 2018 1:53 pm
Forum: Second Order Reactions
Topic: 15.39
Replies: 2
Views: 214

Re: 15.39

Hi, that is actually for part b and 0.37[A]initial comes from finding the moles total moles of A with the information give about concentration B.
Because A--> 2B + C so, [A]total= [A]initial-([B]x([A]/2[B])) to give you 0.055(mol A)/L which is equivalent to 0.37[A]initial

I hope that was helpful
by Katie Blann 1E
Sun Mar 04, 2018 8:38 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 785965

Re: Post All Chemistry Jokes Here

Q: What do you call an acid with an attitude?
A: A-mean-oh-acid
by Katie Blann 1E
Sun Mar 04, 2018 7:27 pm
Forum: General Rate Laws
Topic: Knowing rate law equations
Replies: 5
Views: 168

Re: Knowing rate law equations

I don't think he plans on making us derive any equations on his tests.
by Katie Blann 1E
Sun Mar 04, 2018 7:24 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: Rate Constant K
Replies: 4
Views: 153

Re: Rate Constant K

He used moles and Molar as examples in the notes.
1st order: 1/s
2nd order: L/molxs or L/Mxs
and so on
by Katie Blann 1E
Sun Feb 25, 2018 7:04 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Dissolving metal in a solution
Replies: 3
Views: 117

Dissolving metal in a solution

How do we predict if a metal will dissolve in a solution?
by Katie Blann 1E
Sun Feb 25, 2018 7:02 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Electrochemical Series
Replies: 3
Views: 110

Electrochemical Series

What is meant by electrochemical series?
by Katie Blann 1E
Sun Feb 25, 2018 6:57 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 785965

Re: Post All Chemistry Jokes Here

A photon checks into hotel and is asked if he needs any help with his luggage. He replies, "No, I'm traveling light"
by Katie Blann 1E
Sun Feb 18, 2018 8:32 pm
Forum: Balancing Redox Reactions
Topic: Addition of H3O+ or OH-
Replies: 4
Views: 138

Re: Addition of H3O+ or OH-

Will the question tell you if it is acidic?
by Katie Blann 1E
Sun Feb 18, 2018 8:27 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 785965

Re: Post All Chemistry Jokes Here

Did you know you can your cool yourself to -273.15C and still be 0k?
by Katie Blann 1E
Sun Feb 11, 2018 9:33 pm
Forum: Calculating Work of Expansion
Topic: When to use this equation
Replies: 3
Views: 113

Re: When to use this equation

In the practice midterm we used this equation when the pressure was constant.
by Katie Blann 1E
Sun Feb 11, 2018 9:29 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Vibrational Energy State
Replies: 4
Views: 128

Re: Vibrational Energy State

To add on to this heavier molecules have more vibrational energy states which means more disorder. As well as more complex molecules have more entropy or disorder.
by Katie Blann 1E
Sun Feb 11, 2018 8:32 pm
Forum: Van't Hoff Equation
Topic: Constants and formulas
Replies: 7
Views: 252

Re: Constants and formulas

I think that we have to know it, and it will not be provided on the formula sheet. On the practice midterm we were asked to derive it ourselves.
by Katie Blann 1E
Thu Feb 01, 2018 8:44 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: homework 9.19
Replies: 4
Views: 115

Re: homework 9.19

Thank you!
by Katie Blann 1E
Thu Feb 01, 2018 8:40 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: Homework 9.21
Replies: 3
Views: 112

Homework 9.21

How would you know to use the equation w= 1^64 for this problem?
by Katie Blann 1E
Thu Feb 01, 2018 4:01 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: homework 9.19
Replies: 4
Views: 115

Re: homework 9.19

why in this problem do you have to heat then cool the H2O?
by Katie Blann 1E
Sun Jan 28, 2018 6:38 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Distribution
Replies: 3
Views: 92

Re: Distribution

Can someone explain microstates to me further?
by Katie Blann 1E
Sun Jan 28, 2018 6:22 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Work done by Reversible vs. Irreversible Reactions
Replies: 4
Views: 121

Re: Work done by Reversible vs. Irreversible Reactions

A reversible process is slower so less of the energy is lost as heat. Where a irreversible process tends to generate more friction and more heat is lost to the surroundings.
by Katie Blann 1E
Sun Jan 28, 2018 11:24 am
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: Positional Entropy
Replies: 2
Views: 204

Re: Positional Entropy

Hello! Positional entropy refers to the number of molecular positions or arrangements that a system can have, whereas thermal entropy refers to the amount of thermal energy that is not available for any useful work. Hi I was wondering if you could elaborate on thermal entropy and what you mean by u...
by Katie Blann 1E
Sun Jan 21, 2018 10:44 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Converting L·atm to Joules
Replies: 3
Views: 2380

Re: Converting L·atm to Joules

I think that I Liter per atm is equal to 101.33 Joules.
by Katie Blann 1E
Sun Jan 21, 2018 10:00 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 3 Test Topic is endorsed
Replies: 37
Views: 1639

Re: Week 3 Test Topic is endorsed

Will we have an equation sheet and necessary values provided for the test?
by Katie Blann 1E
Thu Jan 18, 2018 9:03 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Expansion Work vs. Nonexpansion Work
Replies: 2
Views: 117

Re: Expansion Work vs. Nonexpansion Work

Would the equation for non expansive work just be w= force x distance then?
by Katie Blann 1E
Sun Jan 14, 2018 7:23 pm
Forum: Phase Changes & Related Calculations
Topic: Open/Closed/Isolated
Replies: 11
Views: 348

Re: Open/Closed/Isolated

I think the fish tank would be an open system meaning that the system involves the transferring of both matter and energy between system and surroundings. If there are fish in the fish tank then food(matter) would be going in and out of the fish tank. As well as if the system was heated up it would ...
by Katie Blann 1E
Sun Jan 14, 2018 9:43 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Internal Energy
Replies: 2
Views: 101

Re: Internal Energy

Internal energy is the energy contained within a system. It accounts for the energy change in the systems internal state. So, that state can be changed by transfers of matter, heat or by doing work.
Enthalpy is equal to the internal energy of the system plus the product of pressure and volume.
by Katie Blann 1E
Wed Jan 10, 2018 5:42 pm
Forum: Phase Changes & Related Calculations
Topic: chapter 8
Replies: 6
Views: 230

Re: chapter 8

Yes, I believe he is teaching us the second half of chapter eight first and then going to the first half next week.

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