Gas compressibility factor Z: Ideal gas vs Real gas

Gas compressibility factor, Z, and Gas compressibility are not the same. Gas compressibility factor Z is the ratio of the gas volume at a given temperature and pressure to the volume the gas would occupy if it were an ideal gas at the same temperature and pressure.

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Real gasses For an ideal gas, the compressibility factor Z = PV/nRT is equal to unity for all conditions. For a real gas, Z can be expressed as a function. - ppt

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