Path dependent property

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Helen_Lee_1L
Posts: 12
Joined: Wed Sep 21, 2016 3:00 pm

Path dependent property

Postby Helen_Lee_1L » Fri Jan 13, 2017 6:01 pm

In the course reader, it says that work (w) and heat (q) depend on the path taken, and therefore are not state properties. So, my question is, what does it mean to be path dependent?

Mizuno_Mikaela_1D
Posts: 29
Joined: Wed Sep 21, 2016 3:00 pm

Re: Path dependent property

Postby Mizuno_Mikaela_1D » Fri Jan 13, 2017 6:12 pm

Path dependent means the value depends on not only the initial and final states but also the states in between.

The example given in class about work was that if you are walking from one place to another and there are two different routes you can take, a longer route will require more work even though you start at the same place and end at the same place. Thus, it is path dependent.

On the other hand, a state property is determined only by its current state. The initial and final states are the only states that matter and nothing that happened in between will affect the value.


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