State functions

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Rafsan Rana 1A
Posts: 55
Joined: Sat Aug 24, 2019 12:16 am

State functions

Postby Rafsan Rana 1A » Sun Jan 26, 2020 10:45 pm

So heat isn't a state function but internal energy of an isolated system is a state function. What qualifies something to be, or not to be, a state function?

Ashley Wang 4G
Posts: 103
Joined: Wed Sep 11, 2019 12:16 am

Re: State functions

Postby Ashley Wang 4G » Sun Jan 26, 2020 10:52 pm

State functions are defined by its current state and not dependent on the path taken to reach it.

Because heat is a transfer of energy and not an intrinsic property of the system, it is not a state function.

Angus Wu_4G
Posts: 102
Joined: Fri Aug 02, 2019 12:15 am

Re: State functions

Postby Angus Wu_4G » Sun Jan 26, 2020 11:02 pm

A state function is any function in which the value is not dependent on the path taken. If a value were dependent on its path, then it is a path function. A common example of path vs state function is like displacement vs distance traveled. You can travel 5 meters East and 5 meters West, your displacement would be zero, but your distance traveled would be 10 meters.

SimranSangha4I
Posts: 99
Joined: Sat Sep 14, 2019 12:17 am

Re: State functions

Postby SimranSangha4I » Sun Jan 26, 2020 11:29 pm

A state function does not depend on the path taken to reach that specific value, so heat would not be considered a state function.


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