Search found 51 matches

by Ryan_K_1K
Sat Mar 14, 2020 5:49 pm
Forum: General Science Questions
Topic: Final Overview
Replies: 5
Views: 129

Re: Final Overview

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!
by Ryan_K_1K
Sat Mar 14, 2020 5:45 pm
Forum: Administrative Questions and Class Announcements
Topic: Grading Scale
Replies: 14
Views: 288

Re: Grading Scale

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!
by Ryan_K_1K
Sat Mar 14, 2020 5:44 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: What was your favorite chem topic?
Replies: 24
Views: 451

Re: What was your favorite chem topic?

once I got the hang of it, Electrochemistry was by far my favorite!
by Ryan_K_1K
Sat Mar 14, 2020 5:39 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Activation energy
Replies: 7
Views: 55

Re: Activation energy

As far as I know, it is measured in J/M or kJ/M
by Ryan_K_1K
Sat Mar 14, 2020 5:37 pm
Forum: Student Social/Study Group
Topic: Coronavirus Joke
Replies: 14
Views: 743

Re: Coronavirus Joke

this is a good one! Like, WHO is flying the plane?? haha!
by Ryan_K_1K
Sat Mar 14, 2020 5:35 pm
Forum: Administrative Questions and Class Announcements
Topic: final exam - question
Replies: 6
Views: 227

Re: final exam - question

omg I was wondering the same thing. Can anyone clarify?
by Ryan_K_1K
Fri Mar 13, 2020 7:56 pm
Forum: Administrative Questions and Class Announcements
Topic: Final
Replies: 11
Views: 147

Re: Final

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
by Ryan_K_1K
Fri Mar 13, 2020 4:33 pm
Forum: Administrative Questions and Class Announcements
Topic: "Open Book" Final?
Replies: 30
Views: 762

Re: "Open Book" Final?

I believe that pretty much anything goes at this point as long as you aren't plagiarizing
by Ryan_K_1K
Fri Mar 13, 2020 4:31 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: 3rd law
Replies: 3
Views: 82

Re: 3rd law

"The entropy of a system approaches a constant value as its temperature approaches absolute zero."
by Ryan_K_1K
Fri Mar 13, 2020 4:30 pm
Forum: Administrative Questions and Class Announcements
Topic: Final
Replies: 11
Views: 147

Re: Final

yeah, he's been providing information on finals in his emails
by Ryan_K_1K
Fri Mar 13, 2020 4:29 pm
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 282
Views: 134678

Re: Saying Thank You to Dr. Lavelle

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
by Ryan_K_1K
Tue Mar 10, 2020 7:35 pm
Forum: Administrative Questions and Class Announcements
Topic: Situation for Lecture, Discussion, and Final
Replies: 3
Views: 129

Re: Situation for Lecture, Discussion, and Final

Yeah, Lavelle is supposed to send out an Email
by Ryan_K_1K
Tue Mar 10, 2020 7:34 pm
Forum: Student Social/Study Group
Topic: The Final
Replies: 5
Views: 205

Re: The Final

yeah, it will probably be online. I'm assuming the review sessions will be canceled though which is kind of a bummer
by Ryan_K_1K
Sun Mar 08, 2020 11:45 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Notation Layout
Replies: 7
Views: 53

Re: Cell Notation Layout

thank you for the responses! I will make sure to keep the anode on the left when writing in cell notation! :)
by Ryan_K_1K
Sun Mar 08, 2020 11:42 pm
Forum: Administrative Questions and Class Announcements
Topic: Formula Sheet
Replies: 7
Views: 82

Re: Formula Sheet

I think its the same one that we're always given, right?
by Ryan_K_1K
Sun Mar 08, 2020 11:41 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Calculating ln Q
Replies: 20
Views: 222

Re: Calculating ln Q

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.
by Ryan_K_1K
Sun Mar 08, 2020 11:40 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: galvanic vs electrolytic
Replies: 12
Views: 85

Re: galvanic vs electrolytic

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.
by Ryan_K_1K
Sun Mar 08, 2020 11:33 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: largeness of species and molar entropy
Replies: 3
Views: 82

Re: largeness of species and molar entropy

Is it just because larger species are more prone to disorder?
by Ryan_K_1K
Sun Mar 08, 2020 11:33 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: largeness of species and molar entropy
Replies: 3
Views: 82

largeness of species and molar entropy

can someone explain why exactly a larger species has greater molar entropy?
by Ryan_K_1K
Sun Mar 08, 2020 11:28 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Figuring out n
Replies: 15
Views: 191

Re: Figuring out n

n is the number of electrons needed to balance the reaction
by Ryan_K_1K
Sun Mar 08, 2020 11:27 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Diagram
Replies: 6
Views: 76

Re: Cell Diagram

You represent all states of matter in a cell diagram
by Ryan_K_1K
Sun Mar 08, 2020 11:23 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Study Advice
Replies: 73
Views: 3826

Re: Study Advice

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.
by Ryan_K_1K
Sun Mar 08, 2020 11:20 pm
Forum: Balancing Redox Reactions
Topic: Why do we flip E for oxidation?
Replies: 13
Views: 97

Re: Why do we flip E for oxidation?

flipping E simply changes it from reduction to oxidation
by Ryan_K_1K
Sun Mar 08, 2020 11:19 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Notation commas
Replies: 4
Views: 69

Re: Cell Notation commas

Thank you for the replies! I get it now :)
by Ryan_K_1K
Sun Mar 08, 2020 11:18 pm
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 133
Views: 33565

Re: Final Jitters

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 ...
by Ryan_K_1K
Fri Mar 06, 2020 8:11 am
Forum: Administrative Questions and Class Announcements
Topic: Excellence in Chemistry Award!
Replies: 25
Views: 6721

Re: Excellence in Chemistry Award!

Congratulations!
by Ryan_K_1K
Mon Mar 02, 2020 10:26 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Notation Layout
Replies: 7
Views: 53

Cell Notation Layout

Does it matter which side you write the oxidation and reduction reactions for cell notation?
by Ryan_K_1K
Mon Mar 02, 2020 10:25 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Notation commas
Replies: 4
Views: 69

Cell Notation commas

What exactly do the commas between species indicate in cell notation?
by Ryan_K_1K
Sun Feb 23, 2020 4:24 pm
Forum: General Science Questions
Topic: Organic Chemistry Tutor?
Replies: 6
Views: 124

Re: Organic Chemistry Tutor?

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.
by Ryan_K_1K
Sun Feb 23, 2020 4:23 pm
Forum: General Science Questions
Topic: Organic Chemistry Tutor?
Replies: 6
Views: 124

Organic Chemistry Tutor?

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...
by Ryan_K_1K
Sun Feb 23, 2020 4:20 pm
Forum: Balancing Redox Reactions
Topic: Basic and Acidic Conditions
Replies: 5
Views: 61

Basic and Acidic Conditions

What is the difference between balancing a half-reaction "under basic conditions" and balancing one "under acidic conditions?"
by Ryan_K_1K
Sun Feb 23, 2020 4:19 pm
Forum: Balancing Redox Reactions
Topic: Adding H2O and OH- to Balance
Replies: 5
Views: 57

Re: Adding H2O and OH- to Balance

Additional Q: Are you trying to balance the charges on both sides of the half-reaction?
by Ryan_K_1K
Sun Feb 23, 2020 4:18 pm
Forum: Balancing Redox Reactions
Topic: Adding H2O and OH- to Balance
Replies: 5
Views: 57

Adding H2O and OH- to Balance

Can someone explain how adding H2O and OH- to balance a half-reaction works?
by Ryan_K_1K
Sun Feb 23, 2020 4:15 pm
Forum: Balancing Redox Reactions
Topic: Cell Potential Determining Strongest Agents
Replies: 1
Views: 37

Cell Potential Determining Strongest Agents

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!
by Ryan_K_1K
Sun Feb 23, 2020 4:11 pm
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 282
Views: 134678

Re: Saying Thank You to Dr. Lavelle

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!
by Ryan_K_1K
Sun Feb 23, 2020 4:07 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Salt Bridge
Replies: 9
Views: 84

Re: Salt Bridge

the salt bridge transports electrons from the anode to the cathode
by Ryan_K_1K
Sun Feb 23, 2020 4:06 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Standard Cell Potential
Replies: 4
Views: 62

Re: Standard Cell Potential

yes, I believe flipping the reaction changes the sign of the cell potential
by Ryan_K_1K
Sun Feb 09, 2020 5:41 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Pizza Rolls - State Functions
Replies: 5
Views: 83

Pizza Rolls - State Functions

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!
by Ryan_K_1K
Sun Feb 09, 2020 5:31 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8037
Views: 1409063

Re: Post All Chemistry Jokes Here

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

A: "Ow that hertz!"
by Ryan_K_1K
Sun Feb 09, 2020 5:30 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8037
Views: 1409063

Re: Post All Chemistry Jokes Here

Q: What kind of bear dissolves in water?

A: a POLAR bear!
by Ryan_K_1K
Sat Feb 08, 2020 11:07 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Closed Systems
Replies: 13
Views: 106

Re: Closed Systems

Okay! That's what I thought. I know it was a simple question but I wanted to make sure. Thanks!
by Ryan_K_1K
Sat Feb 08, 2020 11:06 am
Forum: Calculating Work of Expansion
Topic: expansion vs nonexpansion
Replies: 5
Views: 50

Re: expansion vs nonexpansion

Thank you so much for the replies! It all makes sense now!
by Ryan_K_1K
Sat Feb 08, 2020 11:03 am
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Endothermic vs Exothermic
Replies: 10
Views: 169

Re: Endothermic vs Exothermic

wow! Thanks for the responses!
by Ryan_K_1K
Wed Jan 29, 2020 2:35 pm
Forum: Calculating Work of Expansion
Topic: expansion vs nonexpansion
Replies: 5
Views: 50

expansion vs nonexpansion

What was the difference between expansion work and nonexpansion work? In other words, what could create nonexpansion work? Compression?
by Ryan_K_1K
Wed Jan 29, 2020 2:33 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Endothermic vs Exothermic
Replies: 10
Views: 169

Endothermic vs Exothermic

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
by Ryan_K_1K
Wed Jan 29, 2020 2:28 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Closed Systems
Replies: 13
Views: 106

Closed Systems

What were the ways that a closed system can be changed? Was it only by changing the temperature and/or volume?
by Ryan_K_1K
Wed Jan 29, 2020 2:21 pm
Forum: Administrative Questions and Class Announcements
Topic: Changing Usernames on Chem Community
Replies: 2
Views: 51

Re: Changing Usernames on Chem Community

Thank you so much! Just changed my username
by Ryan_K_1K
Fri Jan 24, 2020 8:40 am
Forum: Administrative Questions and Class Announcements
Topic: Changing Usernames on Chem Community
Replies: 2
Views: 51

Changing Usernames on Chem Community

How do we change our usernames on chemistry community? Does it matter that mine isn't my real name/my section?
by Ryan_K_1K
Fri Jan 24, 2020 8:38 am
Forum: Administrative Questions and Class Announcements
Topic: Chemistry Community
Replies: 1
Views: 58

Chemistry Community

Are we able to make up lost points for posting on chem community by posting more than 5 posts the following week?
by Ryan_K_1K
Fri Jan 24, 2020 8:35 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Ka and Kb
Replies: 10
Views: 123

Re: Ka and Kb

yeah that's correct. Strong acids and bases also have Ka and Kb values
by Ryan_K_1K
Fri Jan 17, 2020 11:08 am
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student - Part II [ENDORSED]
Replies: 177
Views: 13467

Re: Advice from a Medical Student - Part II [ENDORSED]

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

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