Tetrafluoro methane is the simplest perfluorocarbon. It is the perfluorinated counterpart to hydrocarbon methane. It can also be classified as haloalkane or halomethane. Tetrafluoromethane is a useful refrigerant but also a potent greenhouse gas. It is also known as carbon tetrafluoride and R-14,
CAS no: 75-73-0
Properties
Generic Properties
| Property | Value | Unit |
|---|---|---|
| Chemical Formula | CF4 | - |
| Molecular Weight | 88.005 | - |
| Heat of Combustion | -6136 | kJ/kg |
| Boiling Point | 145.09 | K |
| Freezing Point | 89.56 | K |
Critical Properties
| Property | Value | Unit |
|---|---|---|
| Critical Temperature | 227.5 | K |
| Critical Pressure | 37.39 | bar |
| Critical Volume | 140 | cm3/mol |
| Critical Density | 0.6286 | g/cm3 |
| Critical Z | 0.277 | - |
| Accentric Factor | 0.186 | - |
Temperature Dependent Properties
Specific Heat
The specific heat at constant pressure can be calculated with the formula:
| Constant | Gas | Liquid | Solid |
|---|---|---|---|
| A | 15.278 | 21.905 | -0.815 |
| B | 0.19916 | 0.98067 | 1.0828 |
| C | -0.00016369 | -0.0070731 | -0.00031832 |
| D | 5.169E-08 | 0.000021219 | - |
| E | -3.182E-12 | - | - |
| T min(K) | 100 | 91 | 15 |
| T max(K) | 1500 | 205 | 76 |
Heat of Formation
The heat of formation can be calculated with the formula:
| Constant | Value |
|---|---|
| A | -931.05 |
| B | -0.010833 |
| C | 8.7647E-06 |
| 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 | 10.896 | 1.755 |
| B | 0.5949 | 63.089 |
| C | -0.00017559 | -0.0226 |
| D | - | 0.000036212 |
| T min(K) | 145 | 90 |
| T max(K) | 900 | 216.13 |
Heat of Vaporization
The heat of vaporization can be calculated with the formula:
| Constant | Value |
|---|---|
| A | 16.659 |
| n | 0.349 |
| T min(K) | 89.56 |
| T max(K) | 227.5 |
Thermal Conductivity
The thermal conductivity can be calculated with the formula:
| Constant | Gas | Liquid |
|---|---|---|
| A | -0.0088588 | 0.1962 |
| B | 0.000084571 | -0.00033143 |
| C | -6.905E-09 | -1.4129E-06 |
| T min(K) | 145 | 119.56 |
| T max(K) | 900 | 157.5 |
Liquid Density
The Liquid Density can be calculated with the Equation:
| Constant | Value |
|---|---|
| A | 0.6295 |
| B | 0.2839 |
| n | 0.291 |
| T min(K) | 89.56 |
| T max(K) | 227.5 |
Diffusion Coefficient at Infinite Dilution in Water
The Diffusion Coefficient at Infinite Dilution in Water can be calculation:
| Constant | Value |
|---|---|
| A | -1.3572 |
| B | -1040.923 |
| 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 | -0.05841 |
| B | 0.00040795 |
| C | 7.4575E-07 |
| T min(K) | 200 |
| T max(K) | 1000 |