## Midterm, Question 4B

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

### Midterm, Question 4B

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

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!

Posts: 54
Joined: Thu Jul 27, 2017 3:00 am
Been upvoted: 1 time

### Re: Midterm, Question 4B

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.

Return to “Phase Changes & Related Calculations”

### Who is online

Users browsing this forum: No registered users and 3 guests