Free Expansion


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Samantha Kan 2L
Posts: 30
Joined: Sat Jul 22, 2017 3:00 am

Free Expansion

Postby Samantha Kan 2L » Wed Jan 17, 2018 4:43 pm

The book mentions the concept of free expansion, and I understand that w=0. What would be an example of free expansion? Would we ever encounter a problem with free expansion in this class?

Curtis Tam 1J
Posts: 105
Joined: Thu Jul 13, 2017 3:00 am

Re: Free Expansion

Postby Curtis Tam 1J » Wed Jan 17, 2018 7:00 pm

Free expansion happens when there is no change in volume or when a reaction, for example, is taking place in a vacuum (no pressure, so P=0).

Esin Gumustekin 2J
Posts: 57
Joined: Thu Jul 27, 2017 3:01 am

Re: Free Expansion

Postby Esin Gumustekin 2J » Wed Jan 17, 2018 7:00 pm

An example of free expansion is when a gas is allowed to expand into a vacuum. Since there is no opposing force, w=0 and thus the system does no work. The book states that "expansion against zero pressure is called free expansion".

Hope this helps!

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