Question:3.  What is molar gas constant? Give its significance.

Ans: Definition of ‘R’: The work done for the expansion purpose of one mole of any gas in raising one degree Celsius or Kelvin is called the molar gas constant. It is expressed by R. The value of R does not depend on the nature of the gas. Significance of “R”: From the ideal gas equation, we know-

Hence R is a measure of work. It represents work done per degree per mole

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