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## Ideal gas
At lower temperatures and higher densities, it may be necessary to treat effects of quantum-mechanical statistics even before those of interactions. In such cases, the concept of an ideal gas is extended to that of an ideal Fermi gas or Bose gas. The ideal gas law relates physical conditions as follows: P V = n R T where - P is the pressure of the gas
- V is the volume containg the gas
- n is the molar mass
- R is the universal gas constant
- T is the temperature of the gas
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