Heat v Enthalpy

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TanveerDhaliwal3G
Posts: 105
Joined: Fri Aug 30, 2019 12:17 am

Heat v Enthalpy

Postby TanveerDhaliwal3G » Sun Jan 26, 2020 8:30 pm

Why is heat not a state function while enthalpy is?

Jacey Yang 1F
Posts: 101
Joined: Fri Aug 09, 2019 12:17 am

Re: Heat v Enthalpy

Postby Jacey Yang 1F » Sun Jan 26, 2020 8:43 pm

Heat depends on the path taken to obtain the current state. Enthalpy is a state function because it only depends on the initial and final values of heat, so it doesn't depend on the path taken.

gabbymaraziti
Posts: 111
Joined: Wed Sep 18, 2019 12:19 am

Re: Heat v Enthalpy

Postby gabbymaraziti » Sun Jan 26, 2020 9:01 pm

Enthalpy is a state function that keeps tract of the losses of energy during heat transfer. Heat itself, however, like work, is not a state function because it depends on the path used to go from the initial to the final state.

005206171
Posts: 107
Joined: Wed Sep 18, 2019 12:20 am

Re: Heat v Enthalpy

Postby 005206171 » Sun Jan 26, 2020 9:31 pm

What helps me is to look at the formula of heat and enthalpy. Enthalpy can be calculated using the initial and finals states. Heat is calculated using a bunch of parameters meaning it depends on the path taken.


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