Situation: This problem deals with the isothermal, steady-state expansion of isobutane at, 65 [°C], from 1.2 [bar] to 9.

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Situation This Problem Deals With The Isothermal Steady State Expansion Of Isobutane At 65 C From 1 2 Bar To 9 1 (129.18 KiB) Viewed 45 times

Situation: This problem deals with the isothermal, steady-state expansion of isobutane at, 65 [°C], from 1.2 [bar] to 9.0 [bar]. The isobutane may be considered to behave as an ideal gas at the initial pressure. However, at the final pressure, it is no longer an ideal gas. The critical properties (Tc and Pe) and acentric factor (6) of isobutane are, respectively: 408.1[K], 3.648 [MPa], and 0.181 Requirements: Please, calculate and report the following: 1. Reduced temperature: and reduced pressure: 2. First dimensionless virial coefficients of isobutane: Bo: and B1: 3. The derivative of the dimensionless virial coefficients of isobutane with respect to the reduced temperature: dBo/dT: and dB1/dT: [kJ/mol], and at the outlet: 4. Residual enthalpy of isobutane at the inlet: [kJ/mol] 5. Residual entropy of isobutane at the inlet: [J/mol.K] 6. Change of enthalpy in the expansion: [J/mol-K), and at the outlet: [kJ/mol] 7. Change of entropy in the expansion: [J/mol.K]