It is the simplest member of the ketene class.

**CAS no: **463-51-4

## Properties

#### Generic Properties

Property | Value | Unit |
---|---|---|

Chemical Formula | C2H2O | - |

Molecular Weight | 42.037 | - |

Heat of Combustion | 23338.8 | kJ/kg |

#### Critical Properties

Property | Value | Unit |
---|---|---|

Critical Temperature | 370 | K |

Critical Pressure | 58.1 | bar |

Critical Volume | 144 | cm3/mol |

Critical Density | 0.2919 | g/cm3 |

Critical Z | 0.272 | - |

Accentric Factor | 0.126 | - |

### Temperature Dependent Properties

#### Specific Heat

The specific heat at constant pressure can be calculated with the formula:

Constant | Gas | Liquid |
---|---|---|

A | -14.704 | 35.985 |

B | 0.31238 | 0.43573 |

C | -0.00043385 | -0.0019959 |

D | 0.000000295 | 4.0303E-06 |

E | -7.5221E-11 | - |

Tmin (K) | 200 | 123 |

Tmax (K) | 1500 | 333 |

#### Heat of Formation

The heat of formation can be calculated with the formula:

Constant | Value |
---|---|

A | -44.988 |

B | -0.0098307 |

C | 2.4648E-06 |

Tmin (K) | 298.15 |

Tmax (K) | 1000 |

#### Viscosity

The viscosity can be calculated with the formula:

For liquid

For Gas

Constant | Gas | Liquid |
---|---|---|

A | -1.53 | 159.05 |

B | 0.3616 | -17229 |

C | -0.000057122 | -0.4901 |

D | - | 0.00049377 |

Tmin (K) | 250 | 293.15 |

Tmax (K) | 1000 | 351.5 |

#### Saturation Pressure

Saturation pressure can be calculated with the formula:

Constant | Value |
---|---|

A | 7.08594 |

B | 858.093 |

C | 253.869 |

Tmin (C) | -151.15 |

Tmax (C) | 96.85 |

#### Heat of Vaporization

The heat of vaporization can be calculated with the formula:

Constant | Value |
---|---|

A | 21.373 |

n | 0.105 |

Tmin (K) | 200 |

Tmax (K) | 370 |

#### Thermal Conductivity

The thermal conductivity can be calculated with the formula:

Constant | Gas | Liquid |
---|---|---|

A | -0.012717 | 0.2723 |

B | 0.000090415 | -0.00028323 |

C | 2.4218E-09 | -7.5858E-07 |

Tmin (K) | 250 | 152 |

Tmax (K) | 1000 | 300 |

#### Liquid Density

The Liquid Density can be calculated with the Equation:

Constant | Value |
---|---|

A | 0.2919 |

B | 0.272 |

n | 0.2857 |

Tmin (K) | 122 |

Tmax (K) | 370 |

#### Diffusion Coefficient at Infinite Dilution in Water

The Diffusion Coefficient at Infinite Dilution in Water can be calculation:

Constant | Value |
---|---|

A | -1.3511 |

B | -1040.117 |

Tmin (K) | 274 |

Tmax (K) | 394 |

#### Diffusion Coefficient in Air

The Diffusion Coefficient in Air can be calculated with the Equation:

Constant | Value |
---|---|

A | -0.05767 |

B | 0.00043606 |

C | 8.3755E-07 |

Tmin (K) | 200 |

Tmax (K) | 1000 |