Sound Speeds and Isentropic Compressibility's of Tetrachloroethylene With N-Alcohols Comparison With Theories

Sound velocities for binary mixtures of tetrachloroethylene with 1-propanol, 1-butanol. 1-pentanol, 1-hexanol, 1-heptanol, and 1-octanol were determined at 303.15 K. The results were analysed in terms of the free length theory (FLT) due to Jacobson and Collision factor theory (CFT) due to Schaaffs. The analyses showed that both theories predict satisfactorily sound velocities of the mixtures. Further, isentropic compressibility's, ks . of the mixtures were computed by combining sound velocities and density data derived from excess volumes. The deviation in isentropic compressibility, As, is negative over the whole range of composition for all the mixtures formed by tetrachloroethylene with alcohols. An inversion in the sign of Ks is observed certain ranges of concentration of tetrachloroethylene with 1-octanol. The deviation in isentropic compressibility was found to decrease with increase in chain length of the alcohol.