E2.18 Activity Coefficient

Example 2.18: Benzene (A) is in equilibrium with 2,3,4-trimethylpentane (B). The following data apply:

p_T = 201.74 mmHg, T = 55 °C,

P_A = 327.05 mm Hg, P_B = 178.08 mm Hg,

x_A = 0.0819, y_A = 0.1869

Calculate the activity coefficient of A and B and excess Gibbs energy.

Solution

Activity coefficient of benzene, γ_A (Equation 2.59)

Activity coefficient of 2,3,4-trimethylpentane (Equation 2.59)

Excess free energy, G^ex (Equation 2.58)