8. About ideal gas,
(A)An ideal gas is an assemblage of volumeless noninteracting particles which obeys the ideal gas law, PV = RT.
(B)The internal energy of an ideal gas arises solely from the translational motions of the gas particles and hence is a function only of temperature,
(C)The enthalpy of an ideal gas is a function only of temperature,
(D)The internal energy U is constant with respect to the gas volume, i.e. (dU/dV)_T = 0, hence the pressure P can be expressed as P = (dS/dV)_T,
(E)The above are all correct.