thermodynamic

A tank, well insulated, has two parts divided by partition. The first part incuded 3,5 kg
of water at 800 kPa while the other part is evacuated. This partition is removed and the
water expands to fill the entire tank. If the final pressure and temperature are 100 kPa
and 2000C, respectively, please determine

a- The volume of the tank

b- Temperature of the water for first part