Question

Calculate the value of R in S.I. units for one mole gas at STP.

Answer 1

According to the gas law, it denotes the ideal gas constant of the gas involved and it can be derived from the ideal gas equation.

The equation is expressed as,

                                                     PV = nRT  

where, pressure (P) should be taken as Pa.  

Volume (V) in metre cube.  

The temperature (T) in kelvin and n stands for number of moles.  

The ideal gas equation becomes

,

                                                    PV = nRT

$R=\frac{PV}{nT}$

$=105\times \frac{22.4\times 10^{-3}}{1(273)}$

$R=8.314 JK^{-1} mol^{-1}$