dU, q, w

Moderators: Chem_Mod, Chem_Admin

ntruong2H
Posts: 50
Joined: Sat Jul 09, 2016 3:00 am
Been upvoted: 1 time

dU, q, w

Postby ntruong2H » Wed Mar 15, 2017 5:31 pm

In an isolated system, I know dU=0. Does this also mean that q and w=0?

What are the values for q and w in a closed system?

Thanks.

Tara_Shooshani_3N
Posts: 29
Joined: Wed Sep 21, 2016 3:00 pm

Re: dU, q, w

Postby Tara_Shooshani_3N » Wed Mar 15, 2017 5:34 pm

Since U=0, w=-q

ntruong2H
Posts: 50
Joined: Sat Jul 09, 2016 3:00 am
Been upvoted: 1 time

Re: dU, q, w

Postby ntruong2H » Wed Mar 15, 2017 5:39 pm

Tara_Shooshani_3N wrote:Since U=0, w=-q


So q and w don't equal 0? I thought that since it's isolated, it can't expand/contract and heat can't be exchanged so they'd be = 0

204781248
Posts: 22
Joined: Wed Sep 21, 2016 2:55 pm

Re: dU, q, w

Postby 204781248 » Wed Mar 15, 2017 6:01 pm

ntruong2H wrote:
Tara_Shooshani_3N wrote:Since U=0, w=-q


So q and w don't equal 0? I thought that since it's isolated, it can't expand/contract and heat can't be exchanged so they'd be = 0

you are right. In an isolated system, heat, mass and energy cannot flow from the system to its surroundings or vice versa so they equal 0.


Return to “Thermodynamic Systems (Open, Closed, Isolated)”

Who is online

Users browsing this forum: No registered users and 1 guest