1. The problem statement, all variables and given/known data "see attachment" 2. Relevant equations PV=NkbT Change in entropy = Boltzmann Constant x In(Macrostate) 3. The attempt at a solution for part A, I knew that PV=NKbT giving that pressure is 101300Pa volume is 1*10^-3 m^3, Kb is 1.38*10^-23 and T=300K I find N to be 2.446*10^22 atoms the problem I have is with part B the question states that microstate is proportion to V^N where N is the number of atom I found in part A, and V is the volume which is 1*10-9 m^3. Thus V^N is a very small number which is pretty much zero. Change in entropy = Boltzmann Constant x In(Macrostate), since Macrostate is zero, there is an error in this calculation. Since In(0) is undefined. What am I suppose to do in this question??