Excess molar volumes of binary mixtures of 4-methyl-2-pentanone and some hydrocarbons

摘要

Excess molar volumes (VE) for binary mixtures of 4-methyl-2-pentanone and some hydrocarbons (cyclohexane, benzene, toluene, andp-xylene) over the whole mole fraction range are determined by density measurement at 293.15 K. The variation of theVEvalues with the composition for all binary systems is symmetrical except for benezene where the dependence is sigmoid. TheVEvalues are positive for the binary mixture of the ketone with cyclohexane. For the other hydrocarbons, theVEvalues are progressively negative over the entire mole fraction range except the system containing benzene, where a few values at higher mole fractions of benzene are positive. The results are discussed in terms of molecular interactions steric effects.