[TheJoker72]

Struggling with this question, any help would be appreciated

Calculate the change in entropy of a system when the volume of gas of 21g increases reversibly from 1.2dm^3 to 4.6dm^3 in:

a) Isothermal expansion
b) Adiabatic expansion

[Yggdrasil]

Good starting points would be to calculate the amount of heat and work associated with these transformations, then to consider the formlas that connect the change in entropy to heat and/or work.