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Adiabatic Expansion of an Ideal Gas

Posted: Thu Feb 01, 2018 11:18 pm
by Connie2I
In a problem, how do we know to use the equation for calculating entropy of adiabatic expansion of an Ideal Gas, in other words, using delta S = nRln(V(final) - V(Initial))?
Will the problem just state if the system is adiabatic or are there any more key words to be aware of?

Re: Adiabatic Expansion of an Ideal Gas

Posted: Thu Feb 01, 2018 11:46 pm
by Tanaisha Italia 1B
Other words/phrases could be "assume ideal gas behavior", "the volume changes to/the final volume is", and "what is the change in entropy after the change in volume". It could also say adiabatic, but most problems of this type would refer to a change in volume and have you calculate the change in entropy after giving you initial and final volumes.