universal gas constant

universal gas constant

noun Physics.
a constant, 8.314 joules per degree Kelvin, equal to the product of the pressure and the volume of one gram molecule of an ideal gas divided by the absolute temperature. Symbol: R
Also called gas constant.
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universal gas constant
 
n
another name for gas constant

Collins English Dictionary - Complete & Unabridged 10th Edition
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universal gas constant

(symbol R), fundamental physical constant arising in the formulation of the general gas law. For an ideal gas (approximated by most real gases that are not highly compressed or not near the point of liquefaction), the pressure p times the volume V of the gas divided by its absolute temperature T is a constant. When one of these three is altered for a given mass of gas, at least one of the other two undergoes a change so that the expression pV/T remains constant. The constant, further, is the same for all gases, provided the mass of gas being compared is one mole, or one molecular weight in grams. For one mole, therefore, pV/T = R.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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