The condensability of propylencarbonate and cis-,trans-decalin (40: 60 wt %) were measured using the liquid weighting method in the temperature and pressure ranges of 20-50A degrees C and 1-1000 bar, respectively. The Tait equation coefficients C and B for this temperature interval were calculated. Taking pro-pylencarbonate as an example, it was demonstrated that equation 1/beta (T) = 0.9759 x (1000V (0)/Delta V (1 kbar)) - 4386 proposed earlier for liquids allows us to predict C and B coefficients with good precision.