Effect of molecular shape on the excess volumetric properties of cycloalkane + n‐alkane mixtures

Abstract Excess volumes vE are reported for mixtures of cis‐ and trans‐1,4‐dimethylcyclohexane + n‐heptane, n‐decane, and n‐tetradecane at 293.15 and 313.15 K. The measurements were performed using a vibrating tube densimeter. As expected from previous measurements on methylcycloalkanes, mixtures of the more planar trans‐1,4‐dimethylcyclohexane exhibit a more negative vE than those of the cis‐compound. This effect increases with the chain length of the alkane.