One mole of an ideal gas (Cp=5R/2) in a closed cylindrical piston is expanded from Ti=300 K, Pi=0.5 MPa to Pf=0.1 MPa by an adiabatic pathway. The energy supplied to the system ΔQ, change in internal energy ΔU, and work done by the gas ΔW are:
a) ΔU = 0 J, ΔQ = 4014 J, ΔW = -4014 J
b) ΔU = -4270 J, ΔQ = 0 J, ΔW = 4270 J
c) ΔU = 4270 J, ΔQ = 0 J, ΔW = -4270 J
d) ΔU = -5487 J, ΔQ = 0 J, ΔW = -5487 J
e) ΔU = -5487 J, ΔQ = -5487 J, ΔW = 0 J