Search found 38 matches
- Fri Mar 15, 2019 12:07 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Effect of temp. on rate constants
- Replies: 3
- Views: 352
Re: Effect of temp. on rate constants
Thank you so much this really helps!
- Fri Mar 15, 2019 12:06 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Catalysts vs Intermediates
- Replies: 4
- Views: 426
Re: Catalysts vs Intermediates
Catalysts are there from the beginning and are never used up. Intermediates are formed at some point in the reaction
- Fri Mar 15, 2019 12:06 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: frequency factor
- Replies: 2
- Views: 301
Re: frequency factor
You don't really need to know what the correct orientation but you will need to know how often or "frequently" they are in the correct orientation to collide and form the product
- Fri Mar 15, 2019 12:04 am
- Forum: General Rate Laws
- Topic: Final
- Replies: 9
- Views: 1049
Re: Final
I feel that he will be strict on units but my TA said that they will probably be lenient on the sig figs
- Fri Mar 15, 2019 12:03 am
- Forum: Zero Order Reactions
- Topic: Order distinction
- Replies: 9
- Views: 1057
Re: Order distinction
Add the exponents of the rate law to get the overall order of the reaction
- Fri Mar 15, 2019 12:01 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3007262
Re: Post All Chemistry Jokes Here
What do you call an acid with attitude?
An a-mean-o Acid
An a-mean-o Acid
- Thu Mar 14, 2019 11:59 pm
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: pseudo rate law
- Replies: 7
- Views: 1052
Re: pseudo rate law
I remember reading about it in the textbook but never really haering about it in class
- Thu Mar 14, 2019 11:58 pm
- Forum: General Rate Laws
- Topic: slow/fast steps
- Replies: 7
- Views: 622
Re: slow/fast steps
I think they will tell us
- Thu Mar 14, 2019 11:57 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: k’ and A
- Replies: 4
- Views: 405
Re: k’ and A
k' represents the rate constant of the reaction and A represents the collision factor
- Sun Mar 03, 2019 8:24 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3007262
Re: Post All Chemistry Jokes Here
Did you know that you can cool yourself to -273.15˚C and still be 0k?
- Sun Mar 03, 2019 8:23 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Final exam
- Replies: 8
- Views: 887
Re: Final exam
Sunday, March 17th from 11:30 am to 2:30 pm
- Sun Mar 03, 2019 8:23 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Final exam
- Replies: 8
- Views: 887
Re: Final exam
Sunday, March 17th from 11:30 am to 2:30 pm
- Sun Mar 03, 2019 8:21 pm
- Forum: Van't Hoff Equation
- Topic: Van't Hoff use
- Replies: 13
- Views: 2053
Re: Van't Hoff use
You would use the Van't Hoff equation when you are given two temperatures and a K value
- Sun Mar 03, 2019 8:20 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Q and K with the Nernst Equation
- Replies: 3
- Views: 430
Re: Q and K with the Nernst Equation
I think you would have to find both because you would need to know if they are equal, or if Q is greater than K or if K is greater than Q
- Tue Feb 19, 2019 9:58 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Pressure Equation
- Replies: 7
- Views: 789
Re: Pressure Equation
When calculating change in entropy given constant Temperature, moles, and volume
- Tue Feb 19, 2019 9:56 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Delta G a state function?
- Replies: 23
- Views: 2752
Re: Delta G a state function?
Yes, Delta G is also a state function
- Tue Feb 19, 2019 9:55 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Isolated system
- Replies: 10
- Views: 1243
Re: Isolated system
It is so closed that matter cannot exit or enter the system and it is so insulated that no energy or heat can escape by way of changing pressures or temperatures
- Tue Feb 19, 2019 9:41 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: constant C
- Replies: 7
- Views: 1005
Re: constant C
Cv is for a constant volume, Cp is for a constant pressure, and C is just the general term for specific heat
- Tue Feb 19, 2019 9:39 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: constant C
- Replies: 7
- Views: 1005
Re: constant C
Cv is for a constant volume, Cp is for a constant pressure, and C is just the general term for specific heat
- Tue Feb 19, 2019 9:35 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: What to do when temperature isn't given
- Replies: 8
- Views: 833
Re: What to do when temperature isn't given
Usually at standard conditions, the temperature is simply 25 degrees Celcius or 298 Kelvin but the temperature is usually given for Gibb's Free Energy
- Tue Feb 19, 2019 9:32 pm
- Forum: Student Social/Study Group
- Topic: Test
- Replies: 17
- Views: 1511
Re: Test
Will Test #2 cover the thermodynamics that we learned prior to the midterm or just what we learn between the midterm and the test?
- Tue Feb 19, 2019 9:29 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Final exam
- Replies: 8
- Views: 887
Re: Final exam
The final exam is Sunday March 17th at 11:30 to 2:30 pm
- Tue Feb 19, 2019 9:28 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3007262
Re: Post All Chemistry Jokes Here
Did you hear Magnesium and Oxygen are a couple now?? OMg!!
- Sat Feb 09, 2019 3:59 pm
- Forum: Phase Changes & Related Calculations
- Topic: Why does steam cause severe burns?
- Replies: 2
- Views: 342
Re: Why does steam cause severe burns?
Thank you! I was wondering the same thing and this explanation really helped!
- Sat Feb 09, 2019 3:58 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Delta H's
- Replies: 1
- Views: 192
Delta H's
What is the difference between ΔHf^o and ΔHf
- Sat Feb 09, 2019 3:53 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3007262
Re: Post All Chemistry Jokes Here
I don't trust atoms because they make up everything
- Wed Jan 30, 2019 5:35 pm
- Forum: Phase Changes & Related Calculations
- Topic: Week 4 Homework
- Replies: 12
- Views: 1196
Re: Week 4 Homework
Technically, yes, but I would stick to what we are currently learning in class because some of the later homework problems require you to read further in the book
- Wed Jan 30, 2019 5:34 pm
- Forum: Ideal Gases
- Topic: kc vs kp
- Replies: 19
- Views: 3371
Re: kc vs kp
They both are found and used using the same methods but Kc is used for concentration and Kp is used for pressures of gasses
- Wed Jan 30, 2019 5:32 pm
- Forum: Phase Changes & Related Calculations
- Topic: Water phase change graph
- Replies: 6
- Views: 1432
Re: Water phase change graph
The lines with a zero-slope represent an increase in temperature for a substance at a single state and the lines with positive slopes represent phase changes
- Wed Jan 23, 2019 6:22 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3007262
Re: Post All Chemistry Jokes Here
Wanna hear a Potassium joke?
K :)
K :)
- Wed Jan 23, 2019 6:20 pm
- Forum: Student Social/Study Group
- Topic: UA Worksheets
- Replies: 2
- Views: 335
Re: UA Worksheets
I was wondering the same thing, too. I was wondering if someone could post a solution key with the problem worked out so that I can see how to do the problem and where I went wrong
- Wed Jan 23, 2019 6:18 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE boxes
- Replies: 5
- Views: 472
Re: ICE boxes
Ice boxes can be used to find any equilibrium value whether it be concentration or partial pressure
- Wed Jan 16, 2019 1:16 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Kw
- Replies: 4
- Views: 343
Re: Kw
Kw refers to the concentration of water molecules and since water is a neutral substance on the pH scale, the concentrations of [H3O+] and [OH-] are the same because when you calculate the pH given these numbers, you will get 7, which is right in the middle of the pH scale
- Wed Jan 16, 2019 1:13 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Negative pH
- Replies: 12
- Views: 1483
Re: Negative pH
Most acids that we use in class will probably be from 0 to 14 on the pH scale and we are unlikely to run into any "superacids" that have negative pHs
- Wed Jan 16, 2019 1:05 am
- Forum: Ideal Gases
- Topic: Using Kc or Kp
- Replies: 13
- Views: 938
Re: Using Kc or Kp
You would use Kc when dealing with concentrations of substances and Kp when dealing with the partial pressures of gases
- Mon Jan 14, 2019 12:26 am
- Forum: Ideal Gases
- Topic: Homework Week 2
- Replies: 10
- Views: 960
Re: Homework Week 2
Yes your homework is due during your discussion section!
- Mon Jan 14, 2019 12:23 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: equilibrium
- Replies: 4
- Views: 397
Re: equilibrium
It just means that when a reaction sits to the left, the reactants are favored and when a reaction sits to the right, the products are favored
- Mon Jan 14, 2019 12:18 am
- Forum: Ideal Gases
- Topic: Denoting brackets/parentheses
- Replies: 9
- Views: 2108
Re: Denoting brackets/parentheses
You would use the brackets to denote concentrations or molarity and use parentheses to indicate partial pressure