Calculate S, S total , and S surroundings when the volume of 150. g of CO initially

Calculate ΔS, ΔS _total , and ΔS _surroundings when the volume of 150. g of CO initially at 273 K and 1.00 bar increases by a factor of two in 

a. An adiabatic reversible expansion

b. An expansion against P _external = 0

c. An isothermal reversible expansion. Take C_P,m to be constant at the value 29.14 J mol^–1 K^–1 and assume ideal gas behavior. State whether each process is spontaneous. The temperature of the surroundings is 273 K.