CHEMISTRY COMMUNITY

OmarArafat_2K

I would expect it to come out either on Friday or during the weekend. And I do not believe there will be a curve.

OmarArafat_2K

Thank you for everything, Dr.Lavelle! It has been a great and successful quarter. I appreciate all the support you and the TAs and UAs provided.

OmarArafat_2K

Catalysts lower the activation energy, but increase the speed of the reaction rate. Same thing goes for both forward and reverse rxns.

OmarArafat_2K

I would think that it comes out either next Friday or Saturday, I doubt it will be extended to the week after that.

OmarArafat_2K

Since the style and format of the final are pretty similar to that of the midterms, I strongly suggest starting UA sessions and repeatedly going over textbook questions, especially those you struggle with. There are so many hours of sessions and guides that you should check out. Good luck!

OmarArafat_2K

Yes, you should always convert to mol/L unless you are told otherwise.

OmarArafat_2K

Yes! As long as no heat or energy is able to travel between the inside and outside.

OmarArafat_2K

Remember they have to be the exact same phase and coefficient for them to cancel each other out. The phase is really important in Hess's Law.

OmarArafat_2K

I strongly recommend relaxing while studying. Drink water, eat snacks, maybe turn on some classical music, and always take some breaks to go outside and walk!

OmarArafat_2K

q is 0 since there is no heat transfer, and work is also 0 because there is also no volume change since nothing is able to go in or out. So this means that delta U is also 0.

OmarArafat_2K

Hey! It is just another unit of measure we use. You should keep in mind that:
1 Coulomb = The amount of electrical charge in 6.24 x 10^18 electrons.
1 Volt = 1 J/Coulomb

OmarArafat_2K

I believe that the style and format of the final is pretty similar to that of the midterms. Like everyone else is recommending, I strongly suggest UA sessions and repeatedly going over textbook questions, especially those you struggle with. Good luck!

OmarArafat_2K

I strongly recommend Pride and Prejudice by Jane Austen!

OmarArafat_2K

Driver's License by Olivia Rodrigo if you guys ever want to get in your feels.

OmarArafat_2K

Yes! Note that the anode must always go on the left side and the cathode must always go on the right side of the diagram, as it tells us which is the oxidation and which is the reduction.

OmarArafat_2K

We're not able to review the exams on our own, but we can go to our TA's office hours to see our exam and discuss it.

OmarArafat_2K

The policy is pretty lenient, the syllabus says that a 50% or higher is required to pass with a C- or higher.

OmarArafat_2K

In an open system, both energy and matter can exchange with surroundings
In a closed system, energy can exchange with surroundings
In an isolated system, nothing is able to exchange with surroundings

OmarArafat_2K

Definitely agree with you now that I think about it, but there may be a few exceptions out there to 100% completely isolated systems.

OmarArafat_2K

Redoing various textbook questions, sapling questions, and timing yourself to do questions that you normally struggle on. If you have any questions, attend office hours and ensure you go to any review session.

OmarArafat_2K

Yes, the same rules apply because they are state properties.

OmarArafat_2K

If you did them, don't worry because I heard from my TA that the grading updates are inconsistent so just wait and you should be fine!

OmarArafat_2K

That was a nice read, and I completely relate. Thank you for sharing this post.

OmarArafat_2K

q represents the overall heat while qrev represents the heat from a reversible expansion.

OmarArafat_2K

I will be taking 14BL in the spring. I heard that the workload is not bad, but the midterms are pretty hard. Good luck!

OmarArafat_2K

The Kb (or k) value is actually a constant so he didn't derive it from molecules. It is called the Boltzmann constant.

OmarArafat_2K

In a closed system, energy can exchange with surroundings. In an isolated system, nothing at all can exchange with surroundings. For example, a pot with a lid on it is a closed system. A thermos would be an example of an isolated system. Here's a more in-depth answer: https://www.quora.com/Whats-the...

OmarArafat_2K

CP and CV always remain the same for solids and liquids, so you should be fine. You just have to worry about gases since they can change volume.

OmarArafat_2K

It varies based on what is asked in the question, but Kelvin and Celsius should both be good.

OmarArafat_2K

Tom Brady really carried the Bucs to the Superbowl win, as expected haha.

OmarArafat_2K

On the Sapling homework for Weeks 3 & 4, there were some problems where we had to take phase changes into account! So we definitely need to know this.

OmarArafat_2K

Hess's law is the total enthalpy change for the reaction is the sum of all changes, as it considers enthalpy a state function. I recommend watching this video: https://www.youtube.com/watch?v=2q2u5sj4V00

OmarArafat_2K

Hi, it's pretty simple. Delta H is amount of work while Delta U is amount of all energy.

OmarArafat_2K

I am actually going to be taking 14CL, due to med school reqs, and will take it during the spring quarter to get it over with.

OmarArafat_2K

He hasn't said anything about it, but everyone I asked said to expect it this coming week.

OmarArafat_2K

You can never go wrong with Interstellar and Inception. Two of the best movies of all time.

OmarArafat_2K

The only two methods the professor has taught us are solving through quadratic formulas and approximating. I do not think he would give us complex equations on the midterm that cannot be solved without them.

OmarArafat_2K

50 minutes long, and there will be a certain amount of questions from each difficulty (easy, medium, hard) that are designed to take us 50 minutes.

OmarArafat_2K

I did not take 14A with Lavelle, but I heard from students that did that doing all the textbook questions really help. If you have any questions, feel free to go to Office Hours or Workshops.

OmarArafat_2K

He sent out an email stating that Chemical Equilibria, Acid and Base Equilibria, and some Week 3 Topics (4D.3; 4D.4; 4D.5; 4E.3) will be on the exam. Hope this helps!

OmarArafat_2K

Yes we always leave out H2O from the calculations since it is in excess, so the change in concentration is not significant.

OmarArafat_2K

Yes, it will eventually. Q is the current state reaction quotient and K is the equilibrium constant. Q will eventually reach equilibirum.

OmarArafat_2K

If delta H is positive, the reaction is endothermic and requires heat, which would favor product formation. If delta H is negative, the reaction is exothermic and gives off heat, which favors reactant formation. Hope this helps!

OmarArafat_2K

With Acid dissociations/formations, you use Ka. With base dissociations/formations, use Kb.

OmarArafat_2K

Yes, the TA told me that the midterms should be during lecture times on Friday now.

OmarArafat_2K

Only include H2O in the ice table if it is aqueous and gaseous, never a liquid or a solid. Ensure that you know which phase it is in always.

OmarArafat_2K

Just tried this. Super helpful man, thanks!

OmarArafat_2K

What did one charged atom say to the other?
I got my ion you.

OmarArafat_2K

Hey! I found this website that gives a thorough step-by-step: https://www.vcalc.com/wiki/ekskekel/Convert+Kc+to+Kp . Hope this helps!

OmarArafat_2K

It is just extra work that is probably beneficial in the long run for understanding the concepts, but it is just optional. Our only graded assignments are the weekly Saplings, I'm pretty sure

OmarArafat_2K

What do the other elements say about hydrogen?
He’s such a loner!

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