`(1)/(2)` mole of Helium gas is contained in a container at S.T.P. The heat energy needed to double the pressure of the gas, keeping the volume constant (heat capacity of the gas `=3J g^(-1)K^(-1)`)

Options

A. 3276 J
B. 1638 J
C. 819 J
D. 409.5 J

Answer

B