Question

In the gas equation $PV=nRT$ , the value of $R$ depends upon:

• A. Nature of gas
• B. The pressure of gas
• C. Unit of measurement
• D. Temperature of gas

Answer 1

The correct option is C Unit of measurement

$R$ is the universal gas constant. It has a fixed value which depends upon the units in which $P,V,n$ and $T$ are expressed in the ideal gas equation, $PV=nRT$.

It's values are

$0.0821L\cdot atm\cdot mo{l}^{-1}\cdot K^{-1}$ ,

$8.314J\cdot mo{l}^{-1}\cdot K^{-1}$ or

$2cal\cdot mo{l}^{-1}\cdot K^{-1}$

Thus, option C is correct.