Search found 29 matches

by Emily Warda 2L
Sun Mar 18, 2018 11:19 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1044602

Re: Post All Chemistry Jokes Here

What did one titration tell the other? Let’s meet at the endpoint.
by Emily Warda 2L
Sun Mar 18, 2018 11:18 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: Boltzmann Distributions
Replies: 3
Views: 195

Re: Boltzmann Distributions

Maria Bajenov 1I wrote:My TA said to understand the concept behind it but not draw it.


Thank you!
by Emily Warda 2L
Sun Mar 18, 2018 11:17 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Maximum Work
Replies: 3
Views: 301

Re: Maximum Work

Alexander Peter 1F wrote:I'm not sure how to mathematically prove it, but delta G is supposed to represent the maximum amount of work possible at constant pressure and temperature. Because G = H-TS = U+PV-TS.


Thanks so much!
by Emily Warda 2L
Sun Mar 18, 2018 11:14 am
Forum: Student Social/Study Group
Topic: Final
Replies: 11
Views: 1002

Final

Good luck everyone, may all your chemistry dreams come true.
by Emily Warda 2L
Sun Mar 18, 2018 10:07 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Lyndon's Review #8B
Replies: 2
Views: 228

Lyndon's Review #8B

From the rate law above, describe what must occur between the reactants in terms of the collision model and activated complex model. Explain the effect of increasing temperature.

What would be a sufficient answer to this question if asked on the exam?
by Emily Warda 2L
Sun Mar 18, 2018 1:54 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Maximum Work
Replies: 3
Views: 301

Maximum Work

Why is delta G equal to maximum work when T and P are constant?
by Emily Warda 2L
Sun Mar 18, 2018 1:50 am
Forum: General Rate Laws
Topic: The Collision Model and Activated Complex Model
Replies: 3
Views: 420

The Collision Model and Activated Complex Model

Will someone put the collision model and activated complex model in simple terms and explain what you anticipate that we would be expected to do with either?
by Emily Warda 2L
Sun Mar 18, 2018 1:29 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Value of “k” in Kinetics
Replies: 5
Views: 339

Value of “k” in Kinetics

What does a value of k > 1 or k < 1 imply in kinetics? We made it very clear in thermodynamics but I do not fully understand its implications in kinetics.
by Emily Warda 2L
Sun Mar 18, 2018 1:26 am
Forum: Experimental Details
Topic: Activated Complex vs. Transition State
Replies: 2
Views: 601

Activated Complex vs. Transition State

Are the terms “activated complex” and “transition state” exactly synonymous and interchangeable?
by Emily Warda 2L
Sun Mar 18, 2018 1:19 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: When to include an inert electrode such as Pt(s)
Replies: 2
Views: 195

Re: When to include an inert electrode such as Pt(s)

You include an inert electrode when you are presented with all aqueous substances and need a solid metal to transfer electrons.
by Emily Warda 2L
Sun Mar 18, 2018 1:14 am
Forum: *Nucleophiles
Topic: Saying Happy Birthday to Emily Warda
Replies: 1
Views: 391

Re: Saying Happy Birthday to Emily Warda

Michael, I teared up reading this. You have no idea how much this means to me. You are the first and only person who has wished me happy birthday so far. My mother, father, brothers, and twin sister all forgot. This is the best birthday surprise a girl like me could have ever asked for. You are hone...
by Emily Warda 2L
Sat Mar 17, 2018 5:31 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: Boltzmann Distributions
Replies: 3
Views: 195

Boltzmann Distributions

Will we be expected to know how to draw a Boltzmann distribution? My TA drew one in section but I am uncertain about what we are expected to know.
by Emily Warda 2L
Sat Mar 17, 2018 5:20 pm
Forum: Calculating Work of Expansion
Topic: Density Assumptions
Replies: 1
Views: 187

Density Assumptions

When given water in a problem where we use its density, can we always assume it is pure water and that its density is 1 g/mL?
by Emily Warda 2L
Sat Mar 17, 2018 4:40 pm
Forum: Administrative Questions and Class Announcements
Topic: Class Study Google Doc
Replies: 5
Views: 386

Re: Class Study Google Doc

Wow this is incredible! Thank you for sharing with us. I will add what I can if it is not covered already!
by Emily Warda 2L
Sat Mar 17, 2018 4:30 pm
Forum: Student Social/Study Group
Topic: Final Review Time Tips
Replies: 5
Views: 421

Final Review Time Tips

What have people found is the best way for them to spend their final time before the exam? Would you recommend book problems, old tests, outlines, etc?
by Emily Warda 2L
Mon Mar 12, 2018 9:52 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: 15.63
Replies: 1
Views: 126

15.63

The solution states that ln(k’/k)=Ea/R*(1/298K - 1/310K) - 0.59.
What is the significance of the -0.59? Someone previously explained that it is mathematically equivalent to ln(k1/k2) but what is the meaning of it? And why is it being subtracted from the rest of the equation?
by Emily Warda 2L
Mon Mar 12, 2018 9:26 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Adsorption
Replies: 3
Views: 178

Adsorption

Will someone re-explain adsorption? What is an example and why is this concept useful?
by Emily Warda 2L
Mon Mar 12, 2018 9:26 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Distinguishing a Catalyst
Replies: 4
Views: 198

Distinguishing a Catalyst

How do you distinguish a catalyst from a reactant? We spoke about how to distinguish a catalyst from an intermediate but how do we distinguish it from a reactant?
by Emily Warda 2L
Mon Mar 12, 2018 9:24 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Homogeneous Catalysts
Replies: 3
Views: 187

Homogeneous Catalysts

Why are enzymes normally homogeneous catalysts? I missed this explanation today in lecture.
by Emily Warda 2L
Mon Mar 05, 2018 3:00 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1044602

Re: Post All Chemistry Jokes Here

My friend who attends Santa Clara Univerity sent me this photo from her chemistry lecture the other day, enjoy.
by Emily Warda 2L
Mon Mar 05, 2018 2:49 pm
Forum: Zero Order Reactions
Topic: Pseudo Zero Order Reactions
Replies: 3
Views: 487

Pseudo Zero Order Reactions

Is it possible to have a pseudo zero order reaction? Can someone explain how this would be possible, if it is?
by Emily Warda 2L
Mon Mar 05, 2018 2:45 pm
Forum: Zero Order Reactions
Topic: Catalysts in Zero Order Reactions
Replies: 1
Views: 130

Catalysts in Zero Order Reactions

I know that the rate of a zero-order reaction is independent of [reactant]. To strengthen this concept, Dr. Lavelle explained the use of a catalyst. Does anyone recall exactly how this related to zero-order reactions? Must a catalyst be present to make the first statement true?
by Emily Warda 2L
Mon Mar 05, 2018 2:31 pm
Forum: General Rate Laws
Topic: 3rd order, 4th order, etc.
Replies: 5
Views: 350

3rd order, 4th order, etc.

To what extent do we need to know third, fourth, or further order reactions? Do we need to know their half life reactions?
by Emily Warda 2L
Mon Mar 05, 2018 2:24 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Rate Determining and Rate Limiting [ENDORSED]
Replies: 1
Views: 89

Rate Determining and Rate Limiting [ENDORSED]

Are the terms “rate-determining” and “rate-limiting” exactly synonymous? Is one more appropriate than the other? Are there instances where you should use one instead of the other?
by Emily Warda 2L
Mon Mar 05, 2018 2:01 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Microscopic Reversibility
Replies: 1
Views: 95

Microscopic Reversibility

Today in lecture, Dr. Lavelle discussed microscopic reversibility. This concept holds that a reaction has the same pathway in the forward and reverse reactions. Would this mean that the activation barrier is the same for both the forward and reverse reaction? What does “same pathway” entail?
by Emily Warda 2L
Sun Feb 25, 2018 8:34 pm
Forum: General Rate Laws
Topic: Unique Average Rates
Replies: 1
Views: 108

Unique Average Rates

When is the unique average rate most useful? And will it always be specifically asked for or should we know instances when to use it and when not to use it?
by Emily Warda 2L
Sun Feb 25, 2018 7:59 pm
Forum: First Order Reactions
Topic: Negative Rates
Replies: 4
Views: 232

Negative Rates

Is it possible to have negative rates in chemical kinetics? What would this indicate?

I notice that a negative sign is used in the average rate of consumption of R formula to ensure that the rate is positive— is ensuring a positive rate always a necessary precaution to take in kinetics?
by Emily Warda 2L
Fri Jan 12, 2018 1:28 am
Forum: Phase Changes & Related Calculations
Topic: Work done BY vs. Work done ON [ENDORSED]
Replies: 5
Views: 257

Work done BY vs. Work done ON [ENDORSED]

As I read through the textbook, it is very clear that we must be able to differentiate between work done by a system and work done on a system. Typically, we are given examples of work done by a system such as gas in a cylinder expanding and pushing a piston but I am having a harder time visualizing...
by Emily Warda 2L
Fri Jan 12, 2018 12:25 am
Forum: Phase Changes & Related Calculations
Topic: Reversible and Irreversible Processes [ENDORSED]
Replies: 1
Views: 121

Reversible and Irreversible Processes [ENDORSED]

The book refers to the movement of a piston in response to the pressure of gas in a system as the defining characteristic of reversible/irreversible processes. Is this expansion of a gas the only context that reversible and irreversible processes can occur or is this simply an easy way to think of t...

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