Delta H

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Delta H

Postby AlyssaBei_1F » Mon Feb 11, 2019 10:35 pm

When does delta H replace q in delta u=q+w?

Emma Scholes 1L
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Re: Delta H

Postby Emma Scholes 1L » Mon Feb 11, 2019 10:41 pm

Delta H is equal to q when there is constant pressure.

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Re: Delta H

Postby chaggard » Tue Feb 12, 2019 5:23 pm

This only holds true under constant pressure because if there no other work besides expansion on the system and the pressure throughout remains the same, the the change in enthalpy (delta H) is the same as the heat being consumed or released (q).

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Re: Delta H

Postby Cameron_Greenberg_3C » Sat Feb 16, 2019 9:52 pm

Enthalpy by definition is heat at constant pressure, making it a state variable. So (delta)U= (delta)H + w at constant pressure

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