Redirected from Gas constant
It can be shown that R is an universal constant, equal for all gases. Real gases obey this equation only in an approximation of very diluted gases.
Its value is:
The two digits in parentheses signify the uncertainty (standard deviation) in the last two digits of the value.
The Boltzmann constant k_{B} is defined as a ratio of molar gas constant and the Avogadro's number:
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