## 4B.3

$\Delta U=q+w$

Charisse Vu 1H
Posts: 101
Joined: Thu Jul 25, 2019 12:17 am

### 4B.3

4B.3: 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?

I understand that work was done on the system for the internal energy to be increased by 982 J, but I don't understand why the textbook says that the solution for part b is 90*10^2 J. Wouldn't it just be 982J-492J? (delta U = q + w)

Chem_Mod
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### Re: 4B.3

I believe you are correct; I am not sure why the solutions would say 9000 J