## q and delta H

Ashley McClearnen 1B
Posts: 59
Joined: Fri Sep 28, 2018 12:26 am

### q and delta H

When is it true that q=delta H?

Iona Pay
Posts: 43
Joined: Fri Sep 28, 2018 12:15 am

### Re: q and delta H

q = ∆H when pressure of a system is constant - this is usually written as qp = ∆H. If pressure is not constant, you could calculate q using q = ∆U - w, presuming you know work or total energy change in the system.

Matthew Casillas 1C
Posts: 29
Joined: Fri Sep 28, 2018 12:21 am

### Re: q and delta H

Does this mean that delta H is equal to n*C*m*change in T?

Joon Chang 2F
Posts: 59
Joined: Fri Sep 28, 2018 12:25 am

### Re: q and delta H

q=$\Delta$H=nCp$\Delta$T at constant pressure