056 kg of Nitrogen is enclosed in a vessel at a temperature of 127°C. The amount of heat required to double the speed of its molecules is \ \ \ \ k…

$\displaystyle 056$ kg of Nitrogen is enclosed in a vessel at a temperature of $\displaystyle 127$°C. The amount of heat required to double the speed of its molecules is \_\_\_\_ k cal. (Take $\displaystyle \mathrm{R}=2 \mathrm{cal} \mathrm{mole}^{-1} \mathrm{~K}^{-1}$ )