Vapour pressure of acetone ($C{H}_{3}COC{H}_3$ ) at ${27}^{\circ }C$  is 190 mmHg. In a flask of adjustable volume 14.5 g of  $C{H}_{3}COC{H}_3\left(l\right)$ and some $N_2\left(g\right)$ are taken. The initial volume is 1L, and the pressure, 430 mmHg.The volume occupied by the liquid is negligible.The minimum total pressure (in mmHg) of the system when no liquid remains in the flask at the same temperature is____. [ $R=0.08L.atm.mo{l}^{-1}.K^{-1}$]