q and delta H

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

q and delta H

Postby Ashley McClearnen 1B » Sun Feb 10, 2019 5:47 pm

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

Postby Iona Pay » Sun Feb 10, 2019 5:49 pm

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

Postby Matthew Casillas 1C » Sun Feb 10, 2019 9:50 pm

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

Postby Joon Chang 2F » Sun Feb 10, 2019 9:54 pm

q=H=nCpT at constant pressure


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