## ∆H and ∆U

$w=-P\Delta V$
and
$w=-\int_{V_{1}}^{V_{2}}PdV=-nRTln\frac{V_{2}}{V_{1}}$

Rita Chen 1B
Posts: 112
Joined: Sat Jul 20, 2019 12:15 am

### ∆H and ∆U

Can someone simply explain ∆H and ∆U for me?

Jasmine Fendi 1D
Posts: 108
Joined: Sat Aug 24, 2019 12:15 am

### Re: ∆H and ∆U

Delta H is the change in enthalpy while delta U is the change in internal energy in a system. Most of the time, I think you can use them interchangeably in this class.

DLee_1L
Posts: 103
Joined: Sat Aug 17, 2019 12:17 am

### Re: ∆H and ∆U

You can use delta H and delta U interchangeably when the system has no work done on it and the only thing contributing to delta H is delta U

305385703
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

### Re: ∆H and ∆U

Delta H is the change in enthalpy of a system while delta U is the change in internal energy accompanied by a reaction. In other words, the difference between delta H and delta U is P x Delta V. So Delta H is the total work done and Delta U is just the work done by the heat of the reaction.