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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Famous quotes containing the words perfect and/or gas:
“The hawk is aerial brother of the wave which he sails over and surveys, those his perfect air-inflated wings answering to the elemental unfledged pinions of the sea.”
—Henry David Thoreau (1817–1862)
“... when I awake in the middle of the night, since I knew not where I was, I did not even know at first who I was; I only had in the first simplicity the feeling of existing as it must quiver in an animal.... I spent one second above the centuries of civilization, and the confused glimpse of the gas lamps, then of the shirts with turned-down collars, recomposed, little by little, the original lines of my self.”
—Marcel Proust (1871–1922)