Maximum work

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Claire Polizu 3B
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Joined: Fri Sep 25, 2015 3:00 am

Maximum work

Postby Claire Polizu 3B » Sun Mar 13, 2016 3:07 am

Why is the maximum work equal to the change in Gibbs free energy at constant temperature and pressure?

Alex Nguyen 3I
Posts: 100
Joined: Fri Sep 25, 2015 3:00 am

Re: Maximum work

Postby Alex Nguyen 3I » Sun Mar 13, 2016 10:05 am

Delta G= Delta H - TDeltaS
Not sure, but this is how I thought of it. Delta H is only valid under constant pressure (heat under constant pressure), and temperature in the equation isn't changing (it's not delta T). It's constant.

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Joined: Fri Sep 25, 2015 3:00 am

Re: Maximum work

Postby MichaelPenny1A » Sun Mar 13, 2016 10:11 am

This is the definition of Gibbs free energy. The maximum work is done under conditions of constant temperature and pressure so the Gibbs free energy, which is the amount of energy that is free to do work, is the same as maximum work. It's on page 43 of the course reader.

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