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perfect gas
In physics, a perfect gas is a theoretical gas that differs from real gases in a way that makes certain calculations easier to handle. Its behavior is more simplified compared to an ideal gas (also a theoretical gas). In particular, intermolecular forces are neglected, which means that one can use the ideal gas law without restriction and neglect many complications that may arise from the Van der Waals forces.
== Perfect gas nomenclature ==
The terms ''perfect gas'' and ''ideal gas'' are sometimes used interchangeably, depending on the particular field of physics and engineering.〔J.B. Young, (Thermodynamics, Engineering lecture ). Cambridge University.〕 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.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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