8.49


Moderators: Chem_Mod, Chem_Admin

Katherine Delgadillo 2H
Posts: 10
Joined: Fri Sep 25, 2015 3:00 am

8.49

Postby Katherine Delgadillo 2H » Sun Jan 24, 2016 4:38 pm

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

Postby Jeannie Huang 3B » Sun Jan 24, 2016 4:46 pm

I believe the +1 mol is from 2 mol reactants --> 3 mol products. So change of mols was 3-2 =1.
Other people have posted about this question before so I recommend checking those out :]

Chem_Mod
Posts: 18400
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 435 times

Re: 8.49

Postby Chem_Mod » Sun Jan 24, 2016 4:50 pm

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

viewtopic.php?f=77&t=10319


Return to “Concepts & Calculations Using First Law of Thermodynamics”

Who is online

Users browsing this forum: No registered users and 2 guests