### Adiabatic Expansion of an Ideal Gas

Posted:

**Thu Feb 01, 2018 11:18 pm**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?

Will the problem just state if the system is adiabatic or are there any more key words to be aware of?