Search found 33 matches
- Fri Mar 15, 2019 8:27 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Midterm
- Replies: 4
- Views: 692
Re: Midterm
Kb is given already, it should be on the constant sheet
- Fri Mar 15, 2019 7:06 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Adding Pt(s) to cell diagram
- Replies: 5
- Views: 524
Re: Adding Pt(s) to cell diagram
Not sure about exception, but one side of the cell diagram must have a conducting metal solid
- Fri Mar 15, 2019 7:04 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Limiting Reagents
- Replies: 5
- Views: 621
Re: Limiting Reagents
If you are given two reactants
- Fri Mar 15, 2019 6:57 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2988782
Re: Post All Chemistry Jokes Here
Q: What did the scientist say when he found 2 isotopes of helium?
A: HeHe
A: HeHe
- Fri Mar 15, 2019 6:56 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2988782
Re: Post All Chemistry Jokes Here
: Anyone know any jokes about sodium?
A: Na
A: Na
- Fri Mar 15, 2019 6:55 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2988782
Re: Post All Chemistry Jokes Here
I asked the guy sitting next to me if he had any Sodium Hypobromite…
He said NaBrO
He said NaBrO
- Fri Mar 15, 2019 6:46 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Diagram
- Replies: 2
- Views: 297
Cell Diagram
Whats the difference between a Comma and a vertical line?
- Fri Mar 15, 2019 6:45 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Pt
- Replies: 2
- Views: 494
Pt
Is platinum used as the electrode when the redox reaction lacks a solid on either side, oxidation and or reduction?
- Fri Mar 15, 2019 6:39 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Delta G spontaneity
- Replies: 7
- Views: 1189
Re: Delta G spontaneity
"Delta G is non-spontaneous when both Delta H and Delta S are positive. Moreover, it can be that both Delta H and Delta S are negative. " is not correct. It MAY become nonspontaneous
- Fri Mar 15, 2019 6:35 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Delta G spontaneity
- Replies: 7
- Views: 1189
Re: Delta G spontaneity
When delta H and delta S have differing signs then the reaction is temperature dependent
- Fri Mar 15, 2019 6:32 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Test 2
- Replies: 6
- Views: 1797
Re: Test 2
the reactions occur by themselves therefore they occur spontaneously
- Fri Mar 15, 2019 6:31 pm
- Forum: Student Social/Study Group
- Topic: Lyndon's Review Session
- Replies: 8
- Views: 1506
Re: Lyndon's Review Session
I didn't even know he was making one
- Sat Mar 09, 2019 3:55 pm
- Forum: General Science Questions
- Topic: 14BL [ENDORSED]
- Replies: 3
- Views: 1145
Re: 14BL [ENDORSED]
I'm currently taking in tandem with my 14B and I can safely say you'll de very well in the class if you have Casey because she puts in the effort to help students not only understand the concepts but also be able to interpret and apply it elsewhere. If you took AP Chem in HS it should be a breeze be...
- Sat Mar 09, 2019 3:49 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Determining the order of the reaction
- Replies: 2
- Views: 361
Re: Determining the order of the reaction
you would add exponentents M and N
- Sat Mar 09, 2019 3:46 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: differential rate law equation
- Replies: 3
- Views: 371
Re: differential rate law equation
How would we integrate it? I thought we only integrate when we want to get from a rate order of 2, for example to rate order 1
- Thu Feb 21, 2019 1:58 am
- Forum: Balancing Redox Reactions
- Topic: Weekly Homework
- Replies: 3
- Views: 375
Weekly Homework
So I'm in 14B but this is my first 14 series class (I came from 20A) so I fail to understand how Lavelle's homework system works. How do I know what my homework problems are supposed to be on because he doesn't specify most of the time
- Thu Feb 21, 2019 1:56 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Is there a significance with 298 degrees Kelvin?
- Replies: 5
- Views: 7434
Re: Is there a significance with 298 degrees Kelvin?
It's part of the standard conditions of an ideal gas just as 1 atm is the condition for pressure
- Thu Feb 21, 2019 1:52 am
- Forum: Ideal Gases
- Topic: units
- Replies: 15
- Views: 1305
Re: units
K is unit less because all units should cancel each other out
- Thu Feb 21, 2019 1:51 am
- Forum: Student Social/Study Group
- Topic: Curve?
- Replies: 50
- Views: 6020
Curve?
So the syllabus says that a 50% is required o pass the class with at least a C- but at the same time, "there's no curve" is what I've been hearing from most students so if I have a 75% in the class it'll remain the same but if I get a 50% it'll jump up to 70%?
- Thu Feb 21, 2019 1:47 am
- Forum: Balancing Redox Reactions
- Topic: Reducing agents and oxidizing agents
- Replies: 6
- Views: 678
Re: Reducing agents and oxidizing agents
OIL RIG is much better but I learned it as "LEO the lion goes GIR" but both do the job of helping you remember which is which
- Thu Feb 21, 2019 1:46 am
- Forum: Van't Hoff Equation
- Topic: ΔSº and ΔHº question
- Replies: 5
- Views: 661
Re: ΔSº and ΔHº question
T will mostly affect free energy only. One might think that it also changes enthalpy because the addition of heat will change the forward/irreversible reactions of an equation but the change is minimal
- Thu Feb 21, 2019 1:41 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Units for Gibbs
- Replies: 8
- Views: 906
Re: Units for Gibbs
Doesn't matter as long as it is easy to read (ie Don't have it in joules if you just have it look neater in kj like 10 kJ instead of 10000J) cause the point of science is to be universal and for our data to be easily read and interpreted
- Thu Feb 21, 2019 1:36 am
- Forum: Balancing Redox Reactions
- Topic: Week 7 Homework
- Replies: 15
- Views: 1188
Re: Week 7 Homework
Judging from Lavelle's email sent out this weekend, Gibbs Free Energy
- Thu Feb 21, 2019 1:34 am
- Forum: Balancing Redox Reactions
- Topic: Galvanic cells
- Replies: 4
- Views: 399
Re: Galvanic cells
that's what causes batteries to die
- Thu Feb 21, 2019 1:32 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Salt Bridge/Porous Disk
- Replies: 5
- Views: 558
Re: Salt Bridge/Porous Disk
The adding of these instruments allows for the circuit to continue because there won't be a large accusation of electrons since the purpose of It is to pass ions from one end to another in order to neutralize
- Thu Feb 21, 2019 1:30 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Gibb's free energy Units
- Replies: 4
- Views: 380
Re: Gibb's free energy Units
Either is fine as long as you're careful as to keeping them constant throughout the calculation because I've noticed that the textbook tends to give enthalpy in terms of kJ and Entropy in J so when you're adding them to get Gibbs Free energy make sure they're the same
- Thu Feb 21, 2019 1:26 am
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Stable vs Unstable
- Replies: 2
- Views: 307
Re: Stable vs Unstable
I think stability is based on the use of energy. The universe favors disorder as we've learned from entropy therefore the larger the entropy the more negative our Gibbs free energy gets. That's why if our Gibbs free energy is negative it's stable because its spontaneous meaning that the universe pre...
- Thu Feb 21, 2019 1:21 am
- Forum: Balancing Redox Reactions
- Topic: H+ vs H3O+
- Replies: 10
- Views: 956
Re: H+ vs H3O+
When science becomes ambiguous, I'd stick to what most use. In this case; H+
- Thu Feb 21, 2019 1:19 am
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Delta G a state function?
- Replies: 23
- Views: 2739
Re: Delta G a state function?
It's a state function due to its upbringing that stems from the incorporation of two other state functions: Enthalpy and Entropy
- Thu Feb 21, 2019 1:18 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Porous disc explanation?
- Replies: 6
- Views: 595
Re: Porous disc explanation?
Porous disk ~ Salt bridge: both serve the function of transferring ions
- Thu Feb 21, 2019 1:16 am
- Forum: Ideal Gases
- Topic: Reading the textbook
- Replies: 262
- Views: 146812
Re: Reading the textbook
When I read the textbook, I get really overwhelmed so I stray away from it :)
- Mon Jan 28, 2019 1:25 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Surface area and heat capacity [ENDORSED]
- Replies: 2
- Views: 280
Surface area and heat capacity [ENDORSED]
Wouldn’t it be easier for a solid to heat up if the surface area is larger? I keep thinking about baking. It’s easier to bake the bread if the mold is less deep and the surface area is increased given the same amount of dough
- Mon Jan 28, 2019 1:02 pm
- Forum: Ideal Gases
- Topic: Q and K
- Replies: 13
- Views: 1253
Q and K
What’s the difference between them seeing as they’re calculated the same way?