A gas has a constant-pressure ideal-gas heat capacity of 15R. The gas follows the equation of state,

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A gas has a constant-pressure ideal-gas heat capacity of 15R. The gas follows the equation of state,z = 1+ap RT Z

over the range of interest, where a = -1000 cm3/mole.

(a) Show that the enthalpy departure is of the following form:H-Hig RT || aP RT

(b) Evaluate the enthalpy change for the gas as it undergoes the state change:T = 300 K, P = 0.1 MPa, T = 400 K, P = 2 MPa

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