Freegas
Free gas is a term used in multiple disciplines. In physics and thermodynamics, the free gas (often called an ideal gas) describes a collection of non-interacting particles confined to a volume. The model assumes negligible intermolecular forces except for elastic collisions. It yields the ideal gas equation PV = NkT and predictions such as a linear dependence of internal energy on temperature. Real gases approximate a free gas at high temperature or low density, but deviations occur at high pressure or low temperature.
In petroleum engineering, free gas refers to natural gas that exists as a separate gaseous phase within
In energy policy and common usage, the phrase free gas may appear in discussions of subsidies or
History and related concepts: The ideal-gas model traces to the work of Boltzmann, van der Waals, and