CHEMISTRY COMMUNITY

RitaChang_2C

How do you know when to use q=mCdeltaT vs q=CdeltaT?

RitaChang_2C

For number 5, how do we know the first step is the slow one? Also, could someone explain when and how to use iso- in naming? Or just how to do #1? I was also wondering the same thing. How do we know that the first step is the rate limiting step? Does it have to do with the intermediates in step 1? ...

RitaChang_2C

Did you hear about the man who got cooled to absolute zero?

He's 0K now.

RitaChang_2C

RitaChang_2C

Want to hear a joke about sodium hypobromite?

NaBrO.

RitaChang_2C

I have many chemistry jokes.

I'm just afraid they won't get a good reaction.

RitaChang_2C

You would use ΔG^o=ΔH^o−TΔS^o after you find ΔH^o (rxn) and ΔS^o (rxn) values from the tables provided. Make sure your units match. You will need to convert ΔS^o to KJ for the final answer. That is the equation I am using. And I remembered to convert J to kJ. Still got the wrong answer. I also do n...

RitaChang_2C

104450116 wrote:For number 3, what equation do we use since there seems to be a change in pressure? I can't seem to get the answer posted here by any method I've tried.
Thanks.

Use w=-nRT ln V2/V1
So then you'd get -(2.00 mol)(8.314 J/K mol)(300 K)(ln 18.00/6.00) to get -5480 J or -5.48 kJ.

RitaChang_2C

How often do you like jokes about elements?

Periodically.

RitaChang_2C

If H2O is the formula for water, what is the formula for ice?
H2O cubed!

CHEMISTRY COMMUNITY

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Winter 2015 Final Exam 1D

Re: Quiz 3 Winter 2017

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