## 8.49

$\Delta U=q+w$

Kathleen Vidanes 1E
Posts: 62
Joined: Fri Sep 29, 2017 7:07 am

### 8.49

"Oxygen difluoride is a colorless, very poisonous gas that reacts rapidly with water vapor to produce O2, HF, and heat:
What is the change in internal energy for the reaction of 1.00 mol OF2?"

How do you know that this is an ideal gas?

Brandon Fujii 1K
Posts: 51
Joined: Fri Sep 29, 2017 7:04 am

### Re: 8.49

I think that we assume that this is an ideal gas because we assume that it only interacts with the water vapor and is not affected by other external forces.

andrewr2H
Posts: 29
Joined: Fri Sep 29, 2017 7:05 am

### Re: 8.49

I believe we assume ideal gas behavior just because we wouldn’t be able to solve the question if we didn’t.