Excess volumes for H₂O + D₂O liquid mixtures

Abstract

The volume changes on mixing D₂O with H₂O have been measured with a new tilting-type dilatometer. The molar volumes are very nearly additive, but not exactly so. At 25ºC, the excess molar volume V_m is positive, having a maximum value of about 1.8 x cm³ mol^-1, while at4°C it is negative, with a minimum of about - 1.2^-4 cm³ mol^-l.