Enthalpy and Internal Energy

isochoric/isometric:
isothermal:
isobaric:

Moderators: Chem_Mod, Chem_Admin

Nikolas Abu-Wishah 3F
Posts: 40
Joined: Fri Sep 29, 2023 10:01 am

Enthalpy and Internal Energy

Postby Nikolas Abu-Wishah 3F » Wed Feb 21, 2024 9:11 pm

When is the change in enthalpy greater than the change in internal energy in a system?

harper_2I
Posts: 94
Joined: Fri Sep 29, 2023 11:15 am

Re: Enthalpy and Internal Energy

Postby harper_2I » Wed Feb 21, 2024 9:11 pm

hi! this would happen if work is positive. Basically, delta U = q + w, so if the w is positive, it will make U bigger than than q.
Last edited by harper_2I on Wed Feb 21, 2024 9:12 pm, edited 1 time in total.

Ai-Tan La 1K
Posts: 103
Joined: Fri Sep 29, 2023 11:51 am
Been upvoted: 1 time

Re: Enthalpy and Internal Energy

Postby Ai-Tan La 1K » Wed Feb 21, 2024 9:12 pm

Delta H is greater than Delta U when there is work done by the reaction to the surroundings. This is because delta U is = q + w, and if work is done by the system to the surroundings w is -.


Return to “Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)”

Who is online

Users browsing this forum: No registered users and 2 guests