Chemical, Physical and Thermal Properties of Ammonia

Chemical, physical and thermal properties of Ammonia  - NH3 :

Molecular Weight 17.2
Specific Gravity 0.59
Specific Volume (ft3/lb, m3/kg) 23.0, 1.43
Density of liquid at atmospheric pressure (lb/ft3, kg/m3) 42.6, 686
Vapor pressure at 25oC (psia, MN/m2) 145.4, 1.0
Absolute Viscosity (lbm/ft s, centipoises) 6.72 10-6, 0.01
Sound velocity in gas (m/s) 415
Specific Heat - cp - (Btu/lboF or cal/goC, J/kgK) 0.52, 2175
Specific Heat Ratio - cp/cv 1.3
Gas constant - R - (ft lb/lboR, J/kgoC) 90.8, 488
Thermal Conductivity (Btu/hr ft oF, W/moC) 0.015, 0.026
Boiling Point - saturation pressure 14.7 psia and 760 mm Hg - (oF, oC) -28, -33.3
Latent Heat of Evaporation at boiling point (Btu/lb, J/kg) 589.3, 1373000
Freezing or Melting Point  at 1 atm (oF, oC) -107.9, -77.7
Latent Heat of Fusion (Btu/lb, J/kg) 143.0, 332300
Critical Temperature (oF, oC) 271.4, 132.5
Critical Pressure (psia, MN/m2) 1650, 11.4
Critical Volume (ft3/lb, m3/kg) 0.068, 0.00424
Flammable no
  • values at 25oC (77oF, 298 K) and atmospheric pressure

Ammonia is a colourless gas with a characteristic pungent smell and hazardous in its concentrated form.

Related Topics

  • Material Properties - Material properties for gases, fluids and solids - densities, specific heats, viscosities and more

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