Wis. Admin. Code Department of Safety and Professional Services, SPS 301-399, SPS 326-360, ch. SPS 343, app APPENDIX

Current through September 30, 2024
Appendix - APPENDIX

The material contained in this appendix is for clarification and general information only.

Physical Properties of Ammonia

Molecular symbol NH3

Molecular weight 17.031

Boiling point at one atmosphere*-28°F

Melting point one atmosphere*-107.9°F

Critical temperature 271.4°F

Critical pressure 1657 psia

Latent heat at -28°F and one atmosphere* 589.3 Btu/lb

Relative density of vapor compared to dry air at 32°F and one atmosphere*0.5970

Vapor density at -28°F and one atmosphere*0.05555 lb/ft3

Specific gravity of liquid at -28°F compared to water at 39.2 °F 0.6819

Weight per gallon of liquid at -28°F5.69 lbs/gallon

Liquid density at -28°F and one atmosphere42.57 lbs/ft3

Specific volume of vapor at 32°F and one atmosphere20.78 ft3/lb

Flammable limits by volume in air at atmospheric pressure16% to 25%

Ignition Temperature (in a standard quartz container) 1562° F

Specific Heat, Gas, at 59°F and one atmosphere*

at constant pressure, Cp0.5232 Btu/lb° F

at constant volume, Cv 0.3995 Btu/lb° F

*One atmosphere = 14.7 psia

Wis. Admin. Code Department of Safety and Professional Services, SPS 301-399, SPS 326-360, ch. SPS 343, app APPENDIX