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Internal Energy, U

Posted: Sat Feb 01, 2020 9:29 am
by smurphy1D
Is Delta U always equal to Delta H?

Re: Internal Energy, U

Posted: Sat Feb 01, 2020 9:48 am
by Sally Qiu 2E
it's equal if you are at constant pressure and volume.

Re: Internal Energy, U

Posted: Sat Feb 01, 2020 11:12 am
by Juliana Chopelas 1A
delta u is only equal to delta h when pressure is constant and volume doesn't change

Re: Internal Energy, U

Posted: Sat Feb 01, 2020 1:35 pm
by CMaduno_1L
A counter example would be in an isolated system, where neither heat nor matter can be exchanged, dU = q + w.

Re: Internal Energy, U

Posted: Sat Feb 01, 2020 3:10 pm
by preyasikumar_2L
ΔH = ΔU + PΔV

ΔU is only equal to ΔH when the pressure is constant and the change in volume ΔV = 0.

Re: Internal Energy, U

Posted: Sun Feb 02, 2020 3:38 pm
by Matthew Chan 1B
Only at constant pressure and volume! :)

Re: Internal Energy, U

Posted: Sun Feb 02, 2020 3:58 pm
by Jesse Anderson-Ramirez 3I
Only when change in pressure and change in volume are zero.