Excess enthalpies, excess heat capacities, and speeds of sound of {xc-C6H10O + (1 - x)(n-C7H16 or c-C6H12)} were measured at T = 298.15 K. Densities of the mixtures were also measured at temperatures 298.15 K and 308.15 K and their excess thermal expansive coefficients estimated. Molecular shapes of second components have significant effect on the excess properties. The thermal properties were similar to each other but volumetric properties were considerably different. Non-polar components break the dipolar interaction of ketones, but ketone molecules instantaneously reorient to more stable dipolar orientation. As a result,non-randomness was observed.