Midterm, Question 4B

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Katelyn 2E
Posts: 35
Joined: Sat Jul 22, 2017 3:01 am

Midterm, Question 4B

Postby Katelyn 2E » Tue Mar 13, 2018 11:45 pm

Hi, can anyone provide the correct answer for this question? Thank you!

Kelly Kiremidjian 1C
Posts: 62
Joined: Fri Sep 29, 2017 7:04 am

Re: Midterm, Question 4B

Postby Kelly Kiremidjian 1C » Wed Mar 14, 2018 12:11 am

For this question I used
deltaU=q+w

Since the internal energy of a system decreased by 1763 kJ, deltaU=-1763.
It also gives you the value for w, saying that the system did 1357 kJ of work. When a system does work its negative. so w=-1357. From there you can solve for q, and you should get q= -406 kJ of heat, which means heat was transferred from the system.

Hope this helps!

Ammar Amjad 1L
Posts: 54
Joined: Thu Jul 27, 2017 3:00 am
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Re: Midterm, Question 4B

Postby Ammar Amjad 1L » Wed Mar 14, 2018 8:09 am

Hey,
The midterm solutions are posted on Dr. Lavelle's website.
Here's the link: https://lavelle.chem.ucla.edu/wp-conten ... am_ans.pdf

Hope this helps.


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