Dichlorodifluoromethane R 12
Reference data and engineering information about dichlorodifluoromethane r 12 for gases and compressed air applications.
dichlorodifluoromethane
Overview
Engineering reference data for Dichlorodifluoromethane R 12 in gases and compressed air.
Key Formulas
Ideal Gas Law
Pressure × Volume = moles × gas constant × temperature.
Boyle's Law
At constant temperature.
Charles's Law
At constant pressure.
Variables
| Symbol | Description | Unit |
|---|---|---|
| Pressure | Pa | |
| Volume | m³ | |
| Temperature | K | |
| Gas constant | 8.314 J/(mol·K) |
Physical Properties
Dichlorodifluoromethane (R-12, CF₂Cl₂) is a chlorofluorocarbon refrigerant with the following characteristics:
| Property | Value |
|---|---|
| Molecular Weight | 120.93 g/mol |
| Boiling Point (1.013 bar) | −29.8 °C |
| Latent Heat of Vaporization (1.013 bar) | 166.95 kJ/kg |
| Critical Temperature | 112 °C |
| Critical Pressure | 41.15 bar |
| Gas Density (1.013 bar, boiling point) | 6.25 kg/m³ |
Liquid Properties
| Property | Condition | Value |
|---|---|---|
| Density | 1.013 bar, boiling point | 1486 kg/m³ |
| Density | 250 K | 1468 kg/m³ |
| Density | 300 K | 1304 kg/m³ |
| Specific Heat (cₚ) | 250 K | 0.902 kJ/(kg·K) |
| Specific Heat (cₚ) | 300 K | 0.980 kJ/(kg·K) |
| Dynamic Viscosity | 250 K | 336 × 10⁻⁶ N·s/m² |
| Dynamic Viscosity | 300 K | 213 × 10⁻⁶ N·s/m² |
| Thermal Conductivity | 250 K | 86.8 × 10⁻⁶ kW/(m·K) |
| Thermal Conductivity | 300 K | 68.6 × 10⁻⁶ kW/(m·K) |
| Liquid/Gas Equivalent | 1.013 bar, 15 °C | 292 vol/vol |
Unit Conversions
| Quantity | Conversion |
|---|---|
| Specific Volume | 1 m³/kg = 16.02 ft³/lb = 27,680 in³/lb = 119.8 gal(US)/lb = 99.776 gal(UK)/lb |
| Specific Enthalpy/Energy | 1 kJ/kg = 1 J/g = 0.23885 kcal/kg = 0.4299 Btu/lb = 0.0002778 kWh/kg |