Search found 30 matches
- Sat Mar 16, 2019 10:44 pm
- Forum: General Rate Laws
- Topic: unique rate
- Replies: 3
- Views: 569
unique rate
what is the purpose of the unique rate?
- Sat Mar 16, 2019 10:41 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: different types of cells
- Replies: 1
- Views: 443
different types of cells
what is the difference between a concentration cell, a galvanic cell, a voltaic cell, and an electrolytic cell?
- Sat Mar 16, 2019 10:38 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: unique rate law and reaction mechanisms?
- Replies: 1
- Views: 462
unique rate law and reaction mechanisms?
in lyndon's review today, he set the unique rate law equal to the reaction mechanism. why do you do that?
- Sat Mar 16, 2019 10:37 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: ∆G and work
- Replies: 3
- Views: 871
∆G and work
how are ∆G and work related? is it that if something is spontaneous then it will do more work?
- Sat Mar 16, 2019 10:35 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: adiabatic systems
- Replies: 10
- Views: 937
adiabatic systems
when a system is adiabatic, does that mean no heat is being introduced into the system or does it mean that there is no existing heat at all inside the system?
- Sat Mar 16, 2019 10:33 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: n value
- Replies: 3
- Views: 559
n value
does the n in electrochemistry stand for the number of electrons or number of moles of electrons? how does n cancel out with other units?
- Sat Mar 16, 2019 10:31 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: equilibirum expression
- Replies: 3
- Views: 632
equilibirum expression
do you need to include liquids in the equilibrium expression?
- Sat Mar 16, 2019 10:29 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: exponential vs ln equations
- Replies: 1
- Views: 434
exponential vs ln equations
is there a specific situation where you should use the exponential equation over the ln equation or does it not matter which equation you use? although the answers will be slightly different, will the TAs take points off for the difference?
- Sat Mar 16, 2019 10:28 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: pseudo rate reactions
- Replies: 2
- Views: 565
pseudo rate reactions
is the kprime in pseudo rate reactions the same as the kprime in reaction mechanisms in that it equals the reverse reaction?
- Sat Mar 16, 2019 6:43 pm
- Forum: Administrative Questions and Class Announcements
- Topic: LYNDON'S PORK RAMEN REVIEW
- Replies: 37
- Views: 7396
Re: LYNDON'S PORK RAMEN REVIEW
u the goat thx lyndon
- Sat Mar 16, 2019 3:38 am
- Forum: *Enzyme Kinetics
- Topic: kprime and k1
- Replies: 2
- Views: 605
kprime and k1
When solving the pre-equilibrium method, we are told to write the fraction k1/k-1. instead of writing this, can we just write k, or do they mean different things?
- Sat Mar 16, 2019 3:37 am
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: units in regards to C
- Replies: 1
- Views: 438
units in regards to C
If the constant C does not include a certain unit, should we still include it?
For example, the equation for ∆S = nCln(t2/t1). if we are given grams, but the c value given does not include grams in the units, should we still include the mass in the final answer?
For example, the equation for ∆S = nCln(t2/t1). if we are given grams, but the c value given does not include grams in the units, should we still include the mass in the final answer?
- Sat Mar 16, 2019 3:35 am
- Forum: Phase Changes & Related Calculations
- Topic: moles / mass in phase change problems
- Replies: 3
- Views: 613
moles / mass in phase change problems
when it comes to solving phase changes, do you always use the grams given or would we have to convert it to moles every time
- Sat Mar 16, 2019 3:32 am
- Forum: *Enzyme Kinetics
- Topic: graphing intermediates
- Replies: 2
- Views: 435
graphing intermediates
When graphing the energy diagram for an exothermic reaction, where do you place the intermediate in the graph? do we have to graph catalysts too?
- Sat Mar 16, 2019 3:31 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Ecell
- Replies: 3
- Views: 2000
Ecell
Why does a greater Ecell value a better option? Wouldn't a higher Ecell value mean that the cell has a greater ability to reduce something, thus causing the cell to become more positive?
- Sat Mar 16, 2019 3:30 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Anode and Cathode determination
- Replies: 1
- Views: 420
Anode and Cathode determination
When determining which equation is the anode or the cathode, do you look at the highest positive E number and keep that as the anode? I remember Dr. Lavelle mentioning this in class, but is it because you want a higher Ecell?
- Sat Mar 16, 2019 3:28 am
- Forum: Ideal Gases
- Topic: SI Units
- Replies: 3
- Views: 541
SI Units
When referring to SI units, should we always resort to using atm or barr?
- Sat Mar 16, 2019 3:27 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Ecell Values
- Replies: 3
- Views: 583
Ecell Values
When multiplying a half-reaction by a certain number to match up with the electrons, do you also multiply the E of the cell? or does the Ecell remain independent on the amount of moles in the reaction
- Fri Mar 15, 2019 9:31 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: E equations and when to use them?
- Replies: 2
- Views: 251
E equations and when to use them?
On the constant sheet there are two equations:
E=Eº - RT/nF(lnQ) and E=Eº - 0.05916/n(logQ)
What is the difference between the two? In what situations would i use these equations, or does it not matter?
E=Eº - RT/nF(lnQ) and E=Eº - 0.05916/n(logQ)
What is the difference between the two? In what situations would i use these equations, or does it not matter?
- Fri Mar 15, 2019 5:07 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Cp vs Cv
- Replies: 1
- Views: 466
Cp vs Cv
How do you know when to use Cp vs Cv?
For example, I am doing a problem where the helium balloon increases from 3.0L to 3.5L and the helium behaves as an ideal gas. Why would you use Cv when solving for the problem instead of Cp when volume is not constant?
For example, I am doing a problem where the helium balloon increases from 3.0L to 3.5L and the helium behaves as an ideal gas. Why would you use Cv when solving for the problem instead of Cp when volume is not constant?
- Fri Mar 15, 2019 3:17 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: ordering reduction potential powers
- Replies: 3
- Views: 321
ordering reduction potential powers
if oxidizing power means that the species itself is being reduced, then will you order the powers based from least to greatest positivity or greatest to least positivity? Wouldn't a greater negativity mean it is stronger?
- Fri Mar 15, 2019 3:14 am
- Forum: Second Order Reactions
- Topic: 6th edition 15.39 part b
- Replies: 2
- Views: 480
6th edition 15.39 part b
Determine the time required for each of the following second-order reactions to take place: (b) A--> 2B + C, when [A]0 = 0.15 mol/L, for the concentration of B to increase to 0.19 mol/l, given that k=0.0035 l/molmin in the rate law for the loss of A Why do we subtract (0.19)/(2 mol B) from the origi...
- Fri Mar 15, 2019 3:08 am
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: 6th edition 15.19 part c
- Replies: 1
- Views: 408
6th edition 15.19 part c
In the 6th edition, there is a question asking us to solve for the value of the rate constant (k). There is a table given with all the reaction concentrations and overall rate, and we are to solve for the value K with the table. My question is why did the textbook decide to use the 4th reaction inst...
- Fri Mar 15, 2019 3:03 am
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: 6th edition 15.17
- Replies: 1
- Views: 400
6th edition 15.17
For part A of question 17 in chapter 15, it is stated that C is independent of the rate.
Because of that, do we ignore [C] when calculating the individual orders and the overall order?
Because of that, do we ignore [C] when calculating the individual orders and the overall order?
- Fri Mar 15, 2019 2:38 am
- Forum: Administrative Questions and Class Announcements
- Topic: DOWNLOAD SESSION WORKSHEETS HERE - Sun 7-9PM (Karen)
- Replies: 179
- Views: 22932
Re: DOWNLOAD SESSION WORKSHEETS HERE - Sun 7-9PM (Karen)
how do you solve for worksheet 9 number 6? I used the half-life equation for a first-order reaction and solved for k when the half-life was 6 days. my k value was 0.1155. In order to find the percent of Hg(II) left in the body, would I have to find the k value for the 30-day half-life and divide the...
- Fri Mar 15, 2019 2:30 am
- Forum: Second Order Reactions
- Topic: integrating equations
- Replies: 2
- Views: 545
integrating equations
Do we have to know the steps for integrating a 1st/2nd/0 order rate law or should we just focus on the equations that are derived from this? A problem showed up on Karen's worksheet, which I'm assuming is from a previous exam.
- Fri Mar 15, 2019 2:26 am
- Forum: Administrative Questions and Class Announcements
- Topic: DOWNLOAD SESSION WORKSHEETS HERE - Sun 7-9PM (Karen)
- Replies: 179
- Views: 22932
Re: DOWNLOAD SESSION WORKSHEETS HERE - Sun 7-9PM (Karen)
how do you solve 5a on worksheet number 9?
I know the second order equation is 1/[A]=kt+1/[A]0. If I were to use this equation, wouldn't I just plug the values given into the equation?
The answer that i got was 7.14x10^-11, which is different from the answer. pls help thxxxx
I know the second order equation is 1/[A]=kt+1/[A]0. If I were to use this equation, wouldn't I just plug the values given into the equation?
The answer that i got was 7.14x10^-11, which is different from the answer. pls help thxxxx
- Fri Mar 15, 2019 2:18 am
- Forum: Administrative Questions and Class Announcements
- Topic: DOWNLOAD SESSION WORKSHEETS HERE - Sun 7-9PM (Karen)
- Replies: 179
- Views: 22932
Re: DOWNLOAD SESSION WORKSHEETS HERE - Sun 7-9PM (Karen)
for number 6 of karen's 8th worksheet (kinetics pt 1),
why does k not depend on the order of the reaction? wouldn't the reaction order depend on the value of K?
If there is a higher order then wouldn't the k value be higher?
why does k not depend on the order of the reaction? wouldn't the reaction order depend on the value of K?
If there is a higher order then wouldn't the k value be higher?
- Fri Mar 15, 2019 2:15 am
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: 6th edition 15.19 part c
- Replies: 1
- Views: 217
6th edition 15.19 part c
Part C:
From the data, determine the value of the rate constant
The solutions manual converted the values from mmol to mole. Why do we have to do that when it is not specified?
From the data, determine the value of the rate constant
The solutions manual converted the values from mmol to mole. Why do we have to do that when it is not specified?
- Fri Mar 15, 2019 2:11 am
- Forum: Administrative Questions and Class Announcements
- Topic: DOWNLOAD SESSION WORKSHEETS HERE - Sun 7-9PM (Karen)
- Replies: 179
- Views: 22932
Re: DOWNLOAD SESSION WORKSHEETS HERE - Sun 7-9PM (Karen)
for number 5 of karen's 9th worksheet (kinetics), it says that the rate constant is 7.0x10^0 M.s. Does M stand for molarity or for minutes?