Answer the following statement(s) true (T) or false (F)
A. The mixture fugacity coefficient of component i in the liquid phase must be equal to the mixture fugacity coefficient of component i in the vapor phase.
B. The natural logarithm of the mixture fugacity coefficient of component i in the liquid phase must be equal to the natural logarithm of the mixture fugacity coefficient of component i in the vapor phase.
C. The composition of the liquid phase must be equal to the composition of the vapor phase.
D. Obtaining the fugacity coefficient from the Wilson equation is more accurate than the 2-parameter Margules equation.
E. None of the above are true.
A. Incorrect. Remember the fugacities are NOT the same as the fugacity coefficients. The mixture fugacity of component i in the vapor phase must equal the mixture fugacity of component i in the liquid for the system to be at equilibrium.
B. Incorrect. This is a disguised statement about equality of fugacities at equilibrium. Remember the fugacities are NOT the same as the fugacity coefficients.
C. Incorrect. This is only true at an azeotrope, not true in general.
D. Incorrect. These are excess molar Gibbs free energy models that are used to obtain activity coefficients, not mixture fugacity coefficients.
E. Correct. None of the statements are true.
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