8. The change in entropy for an ideal gas over a reversible isothermal process at the temperature T from the initial pressure P
and volume V to the final pressure P/2 and volume 2Vis
(A) PVlog(1/2)
(B) PVlog(2)
(C) PVlog(1/2)T
(D) PV
10g(2)/T
(E) 2PVlog(2)/T