Statistical Rate Theory Determination of Water Properties below the Triple Point.
June 29th, 2008 | by admin |Statistical Rate Theory Determination of Water Properties below the Triple Point.
We report a new method for determining the saturation vapor pressure, P s( T), of water at conditions below its triple point. P s( T) appears as a parameter in the statistical rate theory (SRT) expression for the net evaporation flux. We use measurements of the interfacial conditions during steady-state evaporation and condensation experiments and SRT to determine the values of P s( T) from 50 different experiments over a range of interfacial conditions. From these values of P s( T), we develop an analytical expression and from it calculate the liquid-vapor latent heat, L lv( T), and the constant pressure specific heat, c p (L)( T). The calculated values of these properties are compared with those obtained from independent measurements. This comparison indicates the SRT expressions for L lv( T) and c p (L)( T) are consistent with the measurements over a range of temperatures.
Duan F, Thompson I, Ward CA.
ward@mie.utoronto.ca.