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Free Expansion

Posted: Fri Feb 15, 2019 2:40 pm
by Soumya Ravichandran 4H
What does free expansion mean? Does it just mean that there was a change in volume, and hence work was present in the system?

Re: Free Expansion

Posted: Fri Feb 15, 2019 3:23 pm
by Chem_Mod
Free expansion refers to a positive change in volume where there is no external pressure that the gas is pushing against (pushing against a vacuum). Thus, work would be zero.

Re: Free Expansion

Posted: Fri Feb 15, 2019 5:05 pm
by MadelynNguyen1F
free expansion is the unrestrained expansion of a gas into a volume

Re: Free Expansion

Posted: Fri Feb 15, 2019 6:05 pm
by Jake Gordon 1A
Free expansion irreversible refers to typically isothermal expansion against a vacuum. Delta U, q, and w will all be 0 however a change in entropy will be equal to the entropy change for reversible isothermal expansion using the same values