(p, rho, T) Measurements of (ammonia + water) in the temperature range 310 K to 400 K at pressures up to 17 MPa. I. Measurements of {chiNH_3 + (1-chi)H_2O} at chi = (0.8952, 0.8041, 0.6985, 0.5052, and 0.1016)

摘要

Measurements of (p,rho, T), for {chiNH_3+(1-chi)H_2O} at chi = (0.8952, 0.8041, 0.6985, 0.5052, and 0.1016) and at specified temperatures and pressures in the compressed liquid phase were carried out with a metal-bellows variable volumometer between T = 310 K and T = 400 K at pressures from the bubble point pressure to p = 17 MPa. The results cover the high-density region from rho = 556 kg·m~(-3) at chi = 0.8952 to rho = 960 kg·m~(-3) at chi = 0.1016. The experimental uncertainties at a 95 per cent confidence interval in temperature T, pressure rho, density rho, and mole fraction chi were estimated to be less than +-11 mK, +- 2.6 kPa, +-2.1·10~(-3) ·rho, and +-1.8·10~(-3)·chi, respectively. Measurements of the bubble point pressure and saturated liquid density at temperatures from 310 K to 400 K are also reported. The bubble point pressures indicate negative deviations from Raoult's law at all investigated temperatures and the excess molar volumes are negative.