Solubility of gases in liquids. XVI. Henry's law coefficients for nitrogen in water at 5 to 50°C

The solubility of nitrogen in pure liquid water was measured in the pressure range 45 to 115 kPa and in the temperature range 5 to 50°C. These data are used to obtain Henry coefficients H_2,1 (T,P_s,1) at the vapor pressure P_s,1 of water. The temperature dependence of H_2,1 (T,P_s,1) is accounted for by both a Clarke-Glew (CG) type fitting equation, and a power series in T^–1, as suggested by Benson and Krause (BK). The imprecision of our measurements is characterized by an average deviation of ±0.038% from a four-term CG equation, and by an average deviation of ±0.042% from a three-term BK equation. From the temperature variation of H_2,1 (T,P_s,1) partial molar quantities referring to the solution process, such as enthalpies and heat capacities of solution, are obtained. They are given in tabular form, together with H_2,1 (T,P_s,1) and derived Ostwald coefficients L, at rounded temperatures. Finally, experimental results are compared with values calculated via scaled particle theory.