delta u sign

Moderators: Chem_Mod, Chem_Admin

Sahand Fardi 1
Posts: 19
Joined: Wed Sep 21, 2016 2:56 pm

delta u sign

Postby Sahand Fardi 1 » Sun Jan 22, 2017 9:06 pm

for the delta u equation that states delta u= delta h-p(delta v), does the sign in the middle become plus when there is work being done on the system? Or, is it always minus regardless of work done on or given off?

Posts: 10
Joined: Wed Nov 18, 2015 3:00 am

Re: delta u sign

Postby Azeel_Mohammed_1C » Sun Jan 22, 2017 9:22 pm

Yes, from what I know, it does become a positive when work is being done on the system.

Posts: 30
Joined: Wed Sep 21, 2016 2:57 pm

Re: delta u sign

Postby Josephine_Tang_1N » Mon Jan 23, 2017 12:42 am

Right - this is since the volume decreases (negative V) and corresponds to a change from: - PV to + PV.

Return to “Phase Changes & Related Calculations”

Who is online

Users browsing this forum: No registered users and 1 guest