It is an organic compound that is a colorless gas in the ambient atmosphere and slightly soluble in water. It is commonly used for refrigeration or air conditioning systems. It is also known as difluroromethylene

**CAS no: **75-10-5

## Properties

#### Generic Properties

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

Chemical Formula | CH2F2 | - |

Molecular Weight | 52.024 | - |

Heat of Combustion | 3517.6 | kJ/kg |

Boiling Point | 221.5 | K |

Freezing Point | 137 | K |

Flash Point | 184.26 | K |

UEL | 27.2 | vol % |

#### Critical Properties

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

Critical Temperature | 351.6 | K |

Critical Pressure | 58.3 | bar |

Critical Volume | 121 | cm3/mol |

Critical Density | 0.43 | g/cm3 |

Critical Z | 0.241 | - |

Accentric Factor | 0.276 | - |

### Temperature Dependent Properties

#### Specific Heat

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

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

A | 30.323 | 55.626 |

B | 0.011176 | 0.36874 |

C | 0.00015809 | -0.0016282 |

D | -1.632E-07 | 0.000003962 |

E | 4.7955E-11 | - |

T min(K) | 100 | 147 |

T max(K) | 1500 | 287 |

#### Heat of Formation

The heat of formation can be calculated with the formula:

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

A | -443.34 |

B | -0.034983 |

C | 0.000016546 |

T min(K) | 298.15 |

T max (K) | 1000 |

#### Viscosity

The viscosity can be calculated with the formula:

For liquid

For Gas

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

A | -3.8067 | -0.9739 |

B | 0.5241 | 136.85 |

C | -0.00012877 | 0.0027 |

D | - | -0.000013376 |

T min(K) | 222 | 200 |

T max(K) | 1000 | 352 |

#### Heat of Vaporization

The heat of vaporization can be calculated with the formula:

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

A | 28.364 |

n | 0.341 |

T min(K) | 137 |

T max(K) | 351.6 |

#### Thermal Conductivity

The thermal conductivity can be calculated with the formula:

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

A | -0.0082349 | 0.3255 |

B | 0.000077931 | -0.00035445 |

C | 2.0958E-08 | -0.000001084 |

T min(K) | 222 | 137 |

T max(K) | 1000 | 334 |

#### Liquid Density

The Liquid Density can be calculated with the Equation:

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

A | 0.4252 |

B | 0.2522 |

n | 0.281 |

T min(K) | 137 |

T max(K) | 351.6 |

#### Saturation Pressure

The Saturation Pressure can be calculated with the Antoine Equation:

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

A | 7.2902 |

B | 863.592 |

C | 247.503 |

T min(C) | -136.15 |

T max(C) | 78.45 |

#### Diffusion Coefficient at Infinite Dilution in Water

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

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

A | -1.3128 |

B | -1035.055 |

T min(K) | 274 |

T max(K) | 394 |

#### Diffusion Coefficient in Air

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

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

A | -0.07307 |

B | 0.00045152 |

C | 8.6625E-07 |

T min(K) | 200 |

T max(K) | 1000 |