Journal of Chemical and Engineering Data, Vol.55, No.9, 3674-3679, 2010
Thermal Properties of Deuterium Oxide near the Triple Point Predicted from Nonequilibrium Evaporation
Statistical rate theory (SRT) was applied to predict the saturation pressure of D(2)O numerically near the triple point based on the interfacial liquid-phase temperature, the interfacial vapor-phase temperature, and the local evaporation flux from 102 local measures in a series of nonequilibrium steady-state droplet evaporation experiments. An analytical expression of the saturation pressure, P(sat) was obtained from the predicted values. Following the thermodynamic relations, the specific entropy of evaporation, h(fg), and the liquid-phase specific heat at constant pressure, C(P)(L), were computed. The agreement that the calculated values of these properties with those obtained from the independent measurements indicates that the SRT expression accurately predicts the thermal properties of D(2)O near the triple point.