Delta S of Surroundings = 0 in Irreversible Process


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Jillian Labador 3E
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Joined: Wed Sep 30, 2020 9:42 pm

Delta S of Surroundings = 0 in Irreversible Process

Postby Jillian Labador 3E » Sat Mar 13, 2021 8:28 pm

Hi! Why is the delta S of surroundings equal to 0 in an irreversible process?

Faaizah Arshad 1H
Posts: 174
Joined: Wed Sep 30, 2020 10:01 pm
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Re: Delta S of Surroundings = 0 in Irreversible Process

Postby Faaizah Arshad 1H » Sat Mar 13, 2021 8:39 pm

Delta S surroundings is zero in an isothermal irreversible process (free expansion) because w = 0 since the system is not pushing against an external pressure. Also, since it's isothermal, delta U is 0. Since delta U = q + w, q must also be 0.


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