The density of acetic acid vapor at the narmal boiling point, 118.5 degrees C, is given as 3.15 g/L (normal boiling point is the boiling point at P =1 atm).

a) calculate the fraction of the vapor that is the monomer and the fraction that is the dimer.

b) what is the partial pressure of the monomer, P sub m, and of the dimer, P sub d?

c) what is the equilibrium constant, Kp, at the temperature for the reaction:

2CH3COOH (g) (CH3COOH)2 (g), Kp= (P sub d)/ (P sub m)^2