Search found 51 matches
- Sun Mar 14, 2021 8:49 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final Grades
- Replies: 19
- Views: 1598
Re: Final Grades
I would expect it to come out either on Friday or during the weekend. And I do not believe there will be a curve.
- Sun Mar 14, 2021 8:45 pm
- Forum: Administrative Questions and Class Announcements
- Topic: THANK YOU DR LAVELLE!
- Replies: 47
- Views: 6758
Re: THANK YOU DR LAVELLE!
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.
- Sun Mar 14, 2021 8:43 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Catalyst
- Replies: 27
- Views: 1161
Re: Catalyst
Catalysts lower the activation energy, but increase the speed of the reaction rate. Same thing goes for both forward and reverse rxns.
- Sun Mar 14, 2021 8:42 pm
- Forum: Student Social/Study Group
- Topic: Final Results
- Replies: 8
- Views: 581
Re: Final Results
I would think that it comes out either next Friday or Saturday, I doubt it will be extended to the week after that.
- Sat Mar 13, 2021 11:12 am
- Forum: Balancing Redox Reactions
- Topic: Studying for finals?
- Replies: 47
- Views: 2282
Re: Studying for finals?
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!
- Tue Mar 09, 2021 9:34 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Q Calculations
- Replies: 21
- Views: 1081
Re: Q Calculations
Yes, you should always convert to mol/L unless you are told otherwise.
- Tue Mar 09, 2021 9:32 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Is thermal mugs an example of an isolated system?
- Replies: 38
- Views: 2118
Re: Is thermal mugs an example of an isolated system?
Yes! As long as no heat or energy is able to travel between the inside and outside.
- Tue Mar 09, 2021 9:29 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Does phase matter in Hess's Law?
- Replies: 21
- Views: 2044
Re: Does phase matter in Hess's Law?
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.
- Tue Mar 09, 2021 9:25 am
- Forum: Student Social/Study Group
- Topic: How do you deal with burnout?
- Replies: 144
- Views: 16499
Re: How do you deal with burnout?
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!
- Tue Mar 09, 2021 9:22 am
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: q and w for an Isolated System
- Replies: 19
- Views: 3445
Re: q and w for an Isolated System
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.
- Sun Feb 28, 2021 11:40 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: coulomb?
- Replies: 18
- Views: 1162
Re: coulomb?
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
1 Coulomb = The amount of electrical charge in 6.24 x 10^18 electrons.
1 Volt = 1 J/Coulomb
- Sun Feb 28, 2021 11:38 pm
- Forum: Student Social/Study Group
- Topic: Chem 14B Final
- Replies: 86
- Views: 5870
Re: Chem 14B Final
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!
- Sun Feb 28, 2021 11:35 pm
- Forum: Student Social/Study Group
- Topic: Book Recommendations
- Replies: 135
- Views: 15367
Re: Book Recommendations
I strongly recommend Pride and Prejudice by Jane Austen!
- Sun Feb 28, 2021 11:33 pm
- Forum: Student Social/Study Group
- Topic: Playlist
- Replies: 86
- Views: 7510
Re: Playlist
Driver's License by Olivia Rodrigo if you guys ever want to get in your feels.
- Sun Feb 28, 2021 11:32 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Anode/Cathode
- Replies: 45
- Views: 1603
Re: Anode/Cathode
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.
- Sun Feb 21, 2021 10:01 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Can We Review our Exams?
- Replies: 69
- Views: 3491
Re: Can We Review our Exams?
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.
- Sun Feb 21, 2021 9:59 pm
- Forum: Student Social/Study Group
- Topic: Points needed to pass?
- Replies: 76
- Views: 8201
Re: Points needed to pass?
The policy is pretty lenient, the syllabus says that a 50% or higher is required to pass with a C- or higher.
- Sun Feb 21, 2021 9:57 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Open vs closed
- Replies: 31
- Views: 2953
Re: Open vs closed
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
In a closed system, energy can exchange with surroundings
In an isolated system, nothing is able to exchange with surroundings
- Sun Feb 21, 2021 9:55 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Isolated System
- Replies: 11
- Views: 818
Re: Isolated System
Definitely agree with you now that I think about it, but there may be a few exceptions out there to 100% completely isolated systems.
- Sun Feb 21, 2021 9:53 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final
- Replies: 48
- Views: 2940
Re: Final
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.
- Sun Feb 14, 2021 10:36 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Adding Equations
- Replies: 16
- Views: 821
Re: Adding Equations
Yes, the same rules apply because they are state properties.
- Sun Feb 14, 2021 10:35 pm
- Forum: Administrative Questions and Class Announcements
- Topic: cc update
- Replies: 23
- Views: 1251
Re: cc update
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!
- Sun Feb 14, 2021 10:21 pm
- Forum: Student Social/Study Group
- Topic: Silly Mistakes?
- Replies: 72
- Views: 6401
Re: Silly Mistakes?
That was a nice read, and I completely relate. Thank you for sharing this post.
- Sun Feb 14, 2021 10:15 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: qrev vs q
- Replies: 21
- Views: 2033
Re: qrev vs q
q represents the overall heat while qrev represents the heat from a reversible expansion.
- Sun Feb 14, 2021 10:07 pm
- Forum: Student Social/Study Group
- Topic: Spring 2021
- Replies: 106
- Views: 16117
Re: Spring 2021
I will be taking 14BL in the spring. I heard that the workload is not bad, but the midterms are pretty hard. Good luck!
- Sun Feb 07, 2021 11:47 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Lecture wk5, Wednesday Question
- Replies: 2
- Views: 141
Re: Lecture wk5, Wednesday Question
The Kb (or k) value is actually a constant so he didn't derive it from molecules. It is called the Boltzmann constant.
- Sun Feb 07, 2021 11:42 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Closed vs Isolated System
- Replies: 30
- Views: 1403
Re: Closed vs Isolated System
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...
- Sun Feb 07, 2021 11:39 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Liquids and Solids
- Replies: 7
- Views: 369
Re: Liquids and Solids
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.
- Sun Feb 07, 2021 11:37 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Units
- Replies: 10
- Views: 439
Re: Units
It varies based on what is asked in the question, but Kelvin and Celsius should both be good.
- Sun Feb 07, 2021 11:34 pm
- Forum: Student Social/Study Group
- Topic: Superbowl Sunday
- Replies: 26
- Views: 1732
Re: Superbowl Sunday
Tom Brady really carried the Bucs to the Superbowl win, as expected haha.
- Sun Jan 31, 2021 8:56 pm
- Forum: Phase Changes & Related Calculations
- Topic: Enthalpy Reactions
- Replies: 13
- Views: 452
Re: Enthalpy Reactions
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.
- Sun Jan 31, 2021 8:51 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Hess's Law
- Replies: 58
- Views: 3135
Re: Hess's Law
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
- Sun Jan 31, 2021 8:49 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: delta H vs delta U
- Replies: 11
- Views: 542
Re: delta H vs delta U
Hi, it's pretty simple. Delta H is amount of work while Delta U is amount of all energy.
- Sun Jan 31, 2021 2:38 pm
- Forum: Administrative Questions and Class Announcements
- Topic: 14C?
- Replies: 23
- Views: 1004
Re: 14C?
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.
- Sun Jan 31, 2021 2:36 pm
- Forum: Administrative Questions and Class Announcements
- Topic: midterm
- Replies: 16
- Views: 627
Re: midterm
He hasn't said anything about it, but everyone I asked said to expect it this coming week.
- Sun Jan 24, 2021 6:53 pm
- Forum: Student Social/Study Group
- Topic: Comfort Movies
- Replies: 168
- Views: 29420
Re: Comfort Movies
You can never go wrong with Interstellar and Inception. Two of the best movies of all time.
- Sun Jan 24, 2021 6:48 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE Box Polynomials
- Replies: 10
- Views: 488
Re: ICE Box Polynomials
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.
- Sun Jan 24, 2021 5:26 pm
- Forum: Student Social/Study Group
- Topic: Midterm
- Replies: 21
- Views: 930
Re: Midterm
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.
- Sun Jan 24, 2021 5:19 pm
- Forum: General Science Questions
- Topic: Studying
- Replies: 67
- Views: 3917
Re: Studying
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.
- Sun Jan 24, 2021 5:12 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm 1 Material?
- Replies: 8
- Views: 354
Re: Midterm 1 Material?
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!
- Sun Jan 17, 2021 9:52 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Kw constant
- Replies: 25
- Views: 851
Re: Kw constant
Yes we always leave out H2O from the calculations since it is in excess, so the change in concentration is not significant.
- Sun Jan 17, 2021 9:50 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: q vs k
- Replies: 62
- Views: 2725
Re: q vs k
Yes, it will eventually. Q is the current state reaction quotient and K is the equilibrium constant. Q will eventually reach equilibirum.
- Sun Jan 17, 2021 9:46 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Temperature
- Replies: 45
- Views: 1463
Re: Temperature
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!
- Sun Jan 17, 2021 9:38 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Using Ka vs Kb
- Replies: 8
- Views: 511
Re: Using Ka vs Kb
With Acid dissociations/formations, you use Ka. With base dissociations/formations, use Kb.
- Fri Jan 15, 2021 8:45 am
- Forum: Student Social/Study Group
- Topic: Exam Changes
- Replies: 12
- Views: 540
Re: Exam Changes
Yes, the TA told me that the midterms should be during lecture times on Friday now.
- Fri Jan 08, 2021 8:00 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Water
- Replies: 28
- Views: 1042
Re: Water
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.
- Fri Jan 08, 2021 7:57 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Calculator Trick for ICEbox Calculations
- Replies: 13
- Views: 797
Re: Calculator Trick for ICEbox Calculations
Just tried this. Super helpful man, thanks!
- Fri Jan 08, 2021 7:55 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3642535
Re: Post All Chemistry Jokes Here
What did one charged atom say to the other?
I got my ion you.
I got my ion you.
- Fri Jan 08, 2021 7:51 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Kc to Kp
- Replies: 8
- Views: 608
Re: Kc to Kp
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!
- Fri Jan 08, 2021 7:45 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Sapling Assignments
- Replies: 30
- Views: 1963
Re: Sapling Assignments
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
- Fri Jan 08, 2021 7:31 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3642535
Re: Post All Chemistry Jokes Here
What do the other elements say about hydrogen?
He’s such a loner!
He’s such a loner!