At atmospheric pressure ethyl acetate and ethyl alcohol form an azeotropic mixture containing 53.9% mole of ethyl acetate and boiling at 71.8°C.
a) Estimate the values of A & B in the empirical van Laar equation
log10 ?1 = A/[1+ (Ax1/Bx2)2]
log10 ?1 = B/[1+ (Bx2/Ax1)2]
b) If A & B are constant, calculate the azeotropic composition and the corresponding total pressure for boiling at 56.3°C.
Data: Vapour pressures of pure components (in mmHg):
71.8°C 56.3°C
Ethyl Alcohol 587 298
Ethyl Acetate 636 360