1. Indicate the wrong statement for the definition of isolated system in the following, (A)no energy interchanged in the system (B)no energy exchange with the surrounding (C)no expansion or contraction of the system (D)no work done by the system (W = 0) (E)no heat entering from outside (Q = 0)

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.

1. Indicate the wrong statement for the definition of isolated system in the following,
(A)no energy interchanged in the system
(B)no energy exchange with the surrounding
(C)no expansion or contraction of the system
(D)no work done by the system (W = 0)
(E)no heat entering from outside (Q = 0)

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