Perfect Gas Nomenclature
The terms perfect gas and ideal gas are sometimes used interchangeably, depending on the particular field of physics and engineering. Sometimes, other distinctions are made, such as between thermally perfect gas and calorically perfect gas, or between imperfect, semi-perfect, perfect, and ideal gases. The assumptions are summarized in the following table.
| Nomenclature 1 |
Nomenclature 2 |
Specific heat at constant V |
Ideal-gas law and |
|---|---|---|---|
| Calorically perfect | Perfect | Constant | Yes |
| Thermally perfect | Semi-perfect | T-dependent | Yes |
| Ideal | May be T and/or p-dependent | Yes | |
| Imperfect | T and p-dependent | No |
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