## 8.49

$\Delta U=q+w$

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### 8.49

Given:
OF2+H20 = O2+2HF ΔH= -318KJ

What is the change in internal energy for the reaction of 1.00 mol of OF2?

I don't understand why Δn=+1mol and how this ends up changing PV=nRT to PΔV=ΔnRT?

Jeannie Huang 3B
Posts: 22
Joined: Fri Sep 25, 2015 3:00 am

### Re: 8.49

I believe the +1 mol is from 2 mol reactants --> 3 mol products. So change of mols was 3-2 =1.

Chem_Mod
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### Re: 8.49

Also see this post for which ideal gas law equations to apply

viewtopic.php?f=77&t=10319