One mole of an ideal diatomic gas expands from volume V to 2 V isothermally at a temperature $27^{\circ} \mathrm{C}$ and does W joule of work. If the gas undergoes same magnitude of expansion adiabatically from $27^{\circ} \mathrm{C}$ doing the same amount of work W , then its final temperature will be (close to) $\_\_\_\_$ ${ }^{\circ} \mathrm{C}$. $\left(\log _{\mathrm{e}} 2=0.693\right)$