CHEMISTRY COMMUNITY

Ryan_K_1K

definitely thermodynamics and chemical kinetics. Thermodynamics is what I personally struggled with the most and chemical kinetics hasn't been tested on before so you can expect to see some potentially unfamiliar material there on the test. Good luck!

Ryan_K_1K

Alfred Barrion 2H wrote:I think its really similar to Chem 14A, 50% is a C-, and he will scale depending on class performance, but it will not hurt you.

phew, glad to know the curve won't work against us! Thanks!

Ryan_K_1K

once I got the hang of it, Electrochemistry was by far my favorite!

Ryan_K_1K

As far as I know, it is measured in J/M or kJ/M

Ryan_K_1K

this is a good one! Like, WHO is flying the plane?? haha!

Ryan_K_1K

omg I was wondering the same thing. Can anyone clarify?

Ryan_K_1K

So are we going to have 4 hours or 3 hours on the final? I know its not a super pressing matter, but I am curious

Ryan_K_1K

I believe that pretty much anything goes at this point as long as you aren't plagiarizing

Ryan_K_1K

"The entropy of a system approaches a constant value as its temperature approaches absolute zero."

Ryan_K_1K

yeah, he's been providing information on finals in his emails

Ryan_K_1K

I know with the whole Coronavirus situation things must be incredibly stressful for Lavelle and all UCLA professors, so I just wanted to say thank you to Lavelle for working diligently to ensure finals are administrated in as fair a manner as possible and for keeping us students updated

Ryan_K_1K

Yeah, Lavelle is supposed to send out an Email

Ryan_K_1K

yeah, it will probably be online. I'm assuming the review sessions will be canceled though which is kind of a bummer

Ryan_K_1K

thank you for the responses! I will make sure to keep the anode on the left when writing in cell notation! :)

Ryan_K_1K

I think its the same one that we're always given, right?

Ryan_K_1K

Q is the concentration of the products of your balanced reaction divided by the concentration of the reactants. It is important to note that the concentrations are raised to the power of the coefficient value in front of a species.

Ryan_K_1K

In a electrolytic cell, energy from an external power source is used to drive a normally non-spontaneous reaction. In a galvanic cell, chemical energy is converted into electrical energy. The redox reaction is spontaneous and the anode is negative and the cathode is the positive electrode.

Ryan_K_1K

Is it just because larger species are more prone to disorder?

Ryan_K_1K

can someone explain why exactly a larger species has greater molar entropy?

Ryan_K_1K

n is the number of electrons needed to balance the reaction

Ryan_K_1K

You represent all states of matter in a cell diagram

Ryan_K_1K

I usually do all the homework problems and before every lecture or review session, I will watch a video related to what I'm going to be learning about to refresh my memory if it has been a while since going over that topic. I tend to learn things really well auditorily so videos are helpful for me.

Ryan_K_1K

flipping E simply changes it from reduction to oxidation

Ryan_K_1K

Thank you for the replies! I get it now :)

Ryan_K_1K

I usually focus on anxiety-preventive behaviors before my anxiety has the opportunity to come at me full force. I study early on to prevent cramming and take frequent breaks during long study sessions. Also, calling a trustworthy friend or a family member is a good way to calm down. Hope this helps ...

Ryan_K_1K

Congratulations!

Ryan_K_1K

Does it matter which side you write the oxidation and reduction reactions for cell notation?

Ryan_K_1K

What exactly do the commas between species indicate in cell notation?

Ryan_K_1K

Also, just as a note: I have watched Lavelle's videos on his site and they were pretty helpful, but I'm looking for more online resources.

Ryan_K_1K

Hello, is anyone familiar with Organic Chem Tutor on Youtube? One of my friends swears by his videos but I don't want to sit through this 3-hour Thermodynamics video if it isn't super relevant to the course content. If Organic Chem Tutor isn't so great, does anyone know of other *free* online videos...

Ryan_K_1K

What is the difference between balancing a half-reaction "under basic conditions" and balancing one "under acidic conditions?"

Ryan_K_1K

Additional Q: Are you trying to balance the charges on both sides of the half-reaction?

Ryan_K_1K

Can someone explain how adding H2O and OH- to balance a half-reaction works?

Ryan_K_1K

Based on the cell potential, how do you determine which species are the strongest reducing/oxidizing agents? I understand that it has to do with the highest cell potential for the forward and reverse reactions but which one is which and how come? Thanks!

Ryan_K_1K

I don't have a strong foundation in chemistry, but the extensive list of resources Dr. Lavelle has made available to us is saving my grade! Thank you for accommodating students from all chem backgrounds!

Ryan_K_1K

the salt bridge transports electrons from the anode to the cathode

Ryan_K_1K

yes, I believe flipping the reaction changes the sign of the cell potential

Ryan_K_1K

Does anyone remember the acronym that was used in the midterm review session to remember the state functions?
It was something like: "when you're Depressed watch TV..." ? ? ?
Or alternatively, does anyone have any other clever acronyms for state functions?
Thanks!

Ryan_K_1K

Q: What did the photon say when it ran into the wall?

A: "Ow that hertz!"

Ryan_K_1K

Q: What kind of bear dissolves in water?

A: a POLAR bear!

Ryan_K_1K

Okay! That's what I thought. I know it was a simple question but I wanted to make sure. Thanks!

Ryan_K_1K

Thank you so much for the replies! It all makes sense now!

Ryan_K_1K

wow! Thanks for the responses!

Ryan_K_1K

What was the difference between expansion work and nonexpansion work? In other words, what could create nonexpansion work? Compression?

Ryan_K_1K

can someone confirm whether this is true: in the delta U = q + w , a negative value for q indicates an exothermic reaction within the system and a positive value indicates an endothermic one

Ryan_K_1K

What were the ways that a closed system can be changed? Was it only by changing the temperature and/or volume?

Ryan_K_1K

Thank you so much! Just changed my username

Ryan_K_1K

How do we change our usernames on chemistry community? Does it matter that mine isn't my real name/my section?

Ryan_K_1K

Are we able to make up lost points for posting on chem community by posting more than 5 posts the following week?

Ryan_K_1K

yeah that's correct. Strong acids and bases also have Ka and Kb values

Ryan_K_1K

Thank you for sharing! As someone who is on the fence about medicine, this was very inspiring!

Search found 51 matches