Liquid water at 180oC' and 1.002.7 kPa has an internal energy ton an arbitrary scale) of 762.0

Question:

Liquid water at 180oC' and 1.002.7 kPa has an internal energy ton an arbitrary scale) of 762.0 kJ kg-1 and a specific volume of 1.128 cm3 g-1.
(a) What is its enthalpy?
(b) The water is brought to the vapor state at 300oC and 1,500 kPa where its internal energy is 2.784.4 kJ kg-1 and its specific volume is 169.7 cm3 g-l, Calculate ∆U and ∆H for the process.