J. R. Brock and R. B. Bird [Am. Inst. Chem. Eng. J., 1, 174 (1955)] found that for liquids...

J. R. Brock and R. B. Bird [Am. Inst. Chem. Eng. J., 1, 174 (1955)] found that for liquids that are not highly polar or hydrogen-bonded the constant γ0 in (7.28) is usually well approximated by

where Pc, Tc, and Zc are the critical pressure, temperature, and compressibility factor. For ethyl acetate, Pc = 37.8 atm, Tc = 523.2 K, and Zc = 0.252. Calculate the percent error of the Brock−Bird predicted value of γ for ethyl acetate at 0°C. The experimental value is 26.5 dyn/cm.