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Absolute Temperature Scale


ABSOLUTE TEMPERATURE SCALE, the scale of temperature based on thermodynamics (q.v.), also called the Kelvin Scale after Lord Kelvin (q.v.). The temperature scale derived from the law of expansion of a perfect gas (q.v.), is iden tical with this thermodynamical scale. The usual abbreviations for absolute scale are abs., A, or K. Comparing it (approxi mately) with the centigrade scale (q.v.), o C = 273 A, oo C A, thus absolute zero is equivalent to 273 C. (See THERMODYNAMICS and THERMOMETRY.)