$1.$ A rigid tank initially contains $1\mathrm{.}4$kg saturated liquid by tar. Now heat is supplied to the percent of the is s occupied by water and the rest by water until the volume is occupurated vapor only. Determine $(($a$)$ the volume of the tank, $($b$)$ the final temperature and pressure, and $($c$)$ the internal energy change of the water.

Water

$1\mathrm{.}4$ kg