Question: Calculate the difference in internal energy of the ideal-gas value and the real-gas value for carbon dioxide at the state 20°C, 1 MPa, as determined

Calculate the difference in internal energy of the ideal-gas value and the real-gas value for carbon dioxide at the state 20°C, 1 MPa, as determined using the virial equation of state, including second virial coefficient terms. For carbon dioxide we have: B = -0.128 m3/kmol, T(dB/dT) = 0.266 m3/kmol, both at 20°C.
virial eq:
Calculate the difference in internal energy of the ideal-gas value
Calculate the difference in internal energy of the ideal-gas value

P-RT, BRI (aP)-RBR RT dB dT OP RT dB u-u =-

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