state function


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megangeorge-1K
Posts: 59
Joined: Thu Feb 01, 2018 3:01 am

state function

Postby megangeorge-1K » Wed Feb 13, 2019 12:30 am

Is work a state function?
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Gillian Murphy 2C
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Joined: Fri Sep 28, 2018 12:22 am

Re: state function

Postby Gillian Murphy 2C » Wed Feb 13, 2019 12:32 am

No- both work and heat are not state functions
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megangeorge-1K
Posts: 59
Joined: Thu Feb 01, 2018 3:01 am

Re: state function

Postby megangeorge-1K » Wed Feb 13, 2019 1:12 pm

why is Internal energy a state function if it is comprised of heat and work which are both not state functions?
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Vicky Lu 1L
Posts: 60
Joined: Fri Sep 28, 2018 12:18 am

Re: state function

Postby Vicky Lu 1L » Wed Feb 13, 2019 1:23 pm

Work is not a state function along with heat and cell potential. Internal energy is a state function as at equilibrium, there is a set amount as delta Utotal = deltaU system + deltaU surrounding. Work and heat are path functions, so you can't find its value based on final - initial.
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Katelyn Pham 4E
Posts: 30
Joined: Fri Sep 28, 2018 12:21 am

Re: state function

Postby Katelyn Pham 4E » Wed Feb 13, 2019 1:28 pm

State functions could be thought of in the pneumonic that Lyndon told us
PD TV HUGS (Pressure, Temperature, Velocity, H (enthalpy), U (internal energy), G (gibbs free energy), S (entropy) are all state functions:
"under Pressure, feeling Depressed, just wanna watch TV and get HUGS"
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