**Main page**

**About us**

**Advertising Opportunities**

# Materials Engineering

**Metals**

**Ceramics**

**Polymers**

**Composites**

**Fluids**

**Engine bearings**

**Materials Data**

**Materials Links**

**Index of SubsTech articles**

*to *Ammonia

*to *Properties of fluids

(submitted by the website administration)

Ammonia |
||||

Chemical formula: NH_{3} |
||||

Property | Value in metric unit | Value in US unit |
||

Molecular mass | 17.03 | 17.03 | ||
---|---|---|---|---|

Density of gas at 59°F (15°C), 1 atm. | 0.73 | kg/m³ | 0.045 | lb/ft³ |

Density of gas at boiling point, 1 atm. | 0.889 | kg/m³ | 0.0555 | lb/ft³ |

Density of liquid at boiling point, 1 atm. | 681.9 | kg/m³ | 42.57 | lb/ft³ |

Heat of fusion at triple point, 1 atm. | 331.4 | kJ/kg | 142.5 | BTU/lb |

Heat of vaporization at boiling point, 1 atm. | 1371 | kJ/kg | 589.4 | BTU/lb |

Specific heat capacity C_{p} at 59°F (15°C), 1 atm. | 2190 | J/(kg*K) | 0.523 | BTU/(lb*ºF) |

Specific heat capacity C_{v} at 59°F (15°C), 1 atm. | 1671 | J/(kg*K) | 0.399 | BTU/(lb*ºF) |

Boiling point at 1 atm. | -33.35 | ºC | -28.03 | ºF |

Melting Point | -77.72 | ºC | -107.9 | ºF |

Thermal conductivity of gas at 32°F (0°C), 1 atm. | 0.022 | W/(m*K) | 0.15 | BTU*in/(hr*ft²*ºF) |

Dynamic viscosity of gas at 32°F (0°C), 1 atm. | 9.8*10^{-5} | poise | 6.5*10^{-6} | lb/(ft*s) |

Dynamic viscosity of liquid at -28°F (-33°C) | 270*10^{-5} | poise | 179*10^{-6} | lb/(ft*s) |

Autoignition temperature | 630 | ºC | 1166 | ºF |

Except where otherwise noted, this work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License