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state functions

Posted: Mon Feb 11, 2019 1:24 am
by Karina Koo 2H
can someone explain to me why heat is not a state function? I read the textbook but i still dont get it. Thanks!

Re: state functions

Posted: Mon Feb 11, 2019 1:26 am
by Bryant Vong 2G
This is because it's dependent on the pressure and volume, meaning it can't be a constant value like with a state function.

Re: state functions

Posted: Mon Feb 11, 2019 8:55 am
by Jayasuriya Senthilvelan 4I
I agree with the above. Heat is like work in that it isn't state function. Its only a state function when there is constant pressure, and heat = enthalpy. Further, heat given off/absorbed by the system is dependent on the pathway taken. See the example in the book on reversible and irreversible isothermal expansion.