CHEMISTRY COMMUNITY

Henry_Shin_3B

I realize that it's impossible to solve the problem since the standard reaction potentials for the two reactions are not given (there's no way I could have come up with the 1.64, -1.33, since those values are empirical, unless I'm terribly mistaken). So on the actual test back in 2013, I'm assuming ...

Henry_Shin_3B

the "n" in the Nernst equation actually doesn't really have anything to do with how many moles of atoms there are in the equation, it instead refers to how many electrons were involved. If you see the original two half reactions, you'll see that the oxidation reaction lost 6 electrons and ...

Henry_Shin_3B

Hello, so I understand that 10 points (out of 400) from our gradebook would be based on our involvement on chemistry community, and that we are given 1 point per week for posting an answer or a question. What about situations in which one has been fairly active on chemistry community, but has someti...

Henry_Shin_3B

I notice that the organic chem course reader is quite thick, and so is the original blue course reader. Will we be completing both of them by the end of the quarter? That seems like an awful lot for only 2 more weeks before finals week.

Henry_Shin_3B

Shelby Slaughter 3D wrote:Will we need to know the details of radioactive decay?

No, I do not believe so. I think the radioactive decay thing was just an example to show what real-life scenarios the concept can be applied.

Henry_Shin_3B

I notice that every midterm in the past four years has been 8 questions, while this year there is only 5.
Will each question simply have more subparts, with the same difficulty as the previous midterms, or should we expect something more challenging than the past four years?

Henry_Shin_3B

If I could not attend a review session due to schedule conflicts, is it not possible to access that review session on my own time? I would have really liked to go over some topics covered in a recent review session but could not make it due to another commitment. Are the TA review sessions also reco...

Henry_Shin_3B

Whenever a substance touches another substance, the temperature of those substances change over time to reach a third, final temperature. When your skin (about 37 degrees Celsius) touches boiling water at 100 degrees Celsius, heat will transfer from the water to your skin and the final temperature w...

Henry_Shin_3B

Why is delta S total positive? I'm having trouble understanding why the problem is a spontaneous process.

I understand that Ssys and G are 0 because they are both state functions, but why is the total entropy change positive?
What part of the problem gives that away?

Thank you.

Henry_Shin_3B

My current understanding is: High molar heat capacity means that a bunch of heat is supplied for only a small temperature change. And therefore for any given amount of temperature change the heat supplied will be very high. Since high heat would mean that the molecules would gain thermal disorder an...

Henry_Shin_3B

Well, there's this thing called the heat capacity, as you know, and we denote it as C. But when samples get very large, we want to look at more manageable values and that's where the Cs (specific heat capacity) and Cm (molar heat capacity) come into play. Cs is basically C divided by m, the mass of ...

Henry_Shin_3B

Essentially the standard enthalpy of formation is how much energy it takes for a bunch of atoms/molecules to form 1 mol of a substance made up of those atoms (w/ the assumption that everything is in standard state) 555.38 kJ is given in the problem, and you can see that there are 2 moles of the prod...

Henry_Shin_3B

Awesome, thanks!

Henry_Shin_3B

Hello; I am new to Dr. Lavelle's class and was wondering if we are provided with formula sheets with all relevant equations and constants for exams and/or quizzes. If not, are we expected to memorize all formulas?

Thank you.

CHEMISTRY COMMUNITY

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Winter 2013 Final Q3A

Re: 2013 Final Exam practice

About the Weekly Online Discussion Points...

Will We Be Completing Both Course Readers?

Re: Quiz 2 Winter 2017

Re: Midterm Winter 2017

Re: Midterm Winter 2017

Re: Why Does Steam Cause Severe Burns?

Practice Quiz 1 #9

Why does high molar heat capacity translate to high molar entropy?

Re: Molar or Specific heat

Re: Calculating Enthalpy [ENDORSED]

Re: New to Lavelle: Formula Sheets? [ENDORSED]

New to Lavelle: Formula Sheets? [ENDORSED]