When Δ H_vap =30 kJ / mol and Δ S_vap =75 J mol^-1 K^-1, then the temperature of vapour, at one atmosphere is ____ K.

When $\displaystyle \Delta \mathrm{H}_{\text {vap }}=30 \mathrm{~kJ} / \mathrm{mol}$ and $\displaystyle \Delta \mathrm{S}_{\text {vap }}=75 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}$, then the temperature of vapour, at one atmosphere is $\displaystyle \_\_\_\_$ K.