The average translational kinetic energy of N2 gas molecules at ...........°C becomes equal to the K.E. of an electron accelerated from rest through a potential difference of 0.1 volt. (Given $\mathrm{K}_{\mathrm{B}}=1.38 \times 10^{-23} \mathrm{~J} / \mathrm{K}$) (Fill the nearest integer)