### Question 4B.3

Posted:

**Fri Feb 07, 2020 9:08 pm**Hello,

I got the first part of this question right, but not the second, I was curious if someone could help me figure out what I'm missing. Thank you!

The internal energy of a system increased by 982 J when it was supplied with 492 J of energy as heat. (a) Was work done by or on the system? (b) How much work was done?

b) Since change in internal energy = q + w => 982 = 492J + w => w=490

The answer key said 900J. I am a bit lost. Any help would be super appreciated!

Thank you,

Prasanna

I got the first part of this question right, but not the second, I was curious if someone could help me figure out what I'm missing. Thank you!

The internal energy of a system increased by 982 J when it was supplied with 492 J of energy as heat. (a) Was work done by or on the system? (b) How much work was done?

b) Since change in internal energy = q + w => 982 = 492J + w => w=490

The answer key said 900J. I am a bit lost. Any help would be super appreciated!

Thank you,

Prasanna