Question

The value of universal gas constant is

• A. 8.03 joule per mole per kelvin
• B. 8.31 joule per mole per kelvin
• C. 3.81 joule per mole per kelvin
• D. 1.38 joule per mole per kelvin

Answer 1

The correct option is B 8.31 joule per mole per kelvin

$\text{R}$ is the ideal, or universal, gas constant, equal to the product of the Boltzmann constant and the Avogadro constant:

$\text{R}=\mu {\text{n}}_{\text{A}}{\text{k}}_{\text{B}}=8.31\text{J}{\text{mol}}^{-1}{\text{K}}^{-1}$

where,

• $\mu$ is the number of moles of the gas present
• ${\text{N}}_{\text{A}}$ is the Avogadro's number $=6.023\times {10}^{23}$ atoms per mole
• ${\text{k}}_{\text{B}}$ is the Boltzmann's constant $=1.38\times {10}^{-23}{\text{J K}}^{-1}$