## ^U=q+w

$\Delta U=q+w$

Nico Edgar 4L
Posts: 32
Joined: Fri Sep 28, 2018 12:19 am

### ^U=q+w

Why is qp+w equal to change in enthalpy -P*change in volume? And why is change in enthalpy -P*change in volume equal to change in moles *R*T?

Patrick Cai 1L
Posts: 93
Joined: Fri Sep 28, 2018 12:25 am

### Re: ^U=q+w

These equations are theoretically derived as shown during lecture, typically involving work (which is equivalent to the negative integral of volume times pressure) and enthalpy (related the internal energy of the system) with assumptions of an idealized reversible thermodynamic system.