Isobaric thermal expansivities of binary mixtures of n-hexane with 1-hexanol at pressures from 0.1 to 350 MPa and at temperatures from 303 to 503 K

Isobaric thermal expansivities, alpha(p)(p, T), of seven binary mixtures of n-hexane with 1-hexanol (0.0553, 0.1088, 0.2737, 0.2983, 0.4962, 0.6036, and 0.7455 mol fraction of 1-hexanol) have been measured with a pressure-controlled scanning calorimeter over the pressure range From just above the saturation pressures to 350 MPa and at temperatures from 302.6 to 503.1 K. The low-temperature isotherms of alpha(p) for particular mixtures observed with respect to the unique crossing point of n-hexane isotherms reveal an association effect which is reduced when the temperature increases. The high-temperature isotherms of alpha(p) are very similar to the isotherms of pure n-hexane, especially for loa er mole fractions of n-hexanol. No known equation of state can reproduce these properties.