Ammonia Gas Specific volume ( 1.013 bar and 21 oC (70 oF)) : 1.411 m 3/kg.Ammonia Gas Specific Gravity (air = 1) (1.013 bar and 21 oC (70 oF)) : 0.597.
Ammonia Gas Compressibility Factor (Z) (the ratio of the actual volume of the gas to the volume determined according to the perfect gas law) ( 1.013 bar and 15 oC (59 oF)) : 0.9929.Ammonia Gas Density ( 1.013 bar at boiling point) : 0.86 kg/m 3.Ammonia Critical point - Critical temperature : 132.4 oC - Critical pressure : 112.8 bar.Ammonia Vapor pressure (at 21 oC or 70 oF) : 8.88 bar.Ammonia Latent heat of vaporization ( 1.013 bar at boiling point) : 1371.2 kJ/kg.Ammonia Boiling point ( 1.013 bar) : -33.5 oC.Ammonia Liquid/gas equivalent ( 1.013 bar and 15 oC (59 oF)) : 947 vol/vol.Ammonia Latent heat of fusion ( 1,013 bar, at triple point) : 331.37 kJ/kg.