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physical object > natural object > collection of particles > phase of matter > gas > ideal gas

ideal gas comparison table

Subject	has definition	has synonym	is a kind of
gas	The gaseous component of a galaxy, includes nebula		phase of matter
ideal gas	he pressure of a gas is directly proportional to the product of its temperature and density (p = CρT). The higher the temperature and the more rarefied a gas, the more closely it obeys the ideal gas laws, so the gases in most stars closely approximate ideal gases. For a degenerate gas, the pressure depends only on the density and is independent of the temperature.	perfect gas	gas

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