liquid water at 100C and 1 bar has internal energy (on an arbitrary scale) of 419 kj /kg and a specific volume of 1.044cm3 /g

a- what is its enthalpy?
b-the water brought to the vapor state at 200C and 800 kpa, where its enthalpy is 2838.6 kj/kg and it is specific volume is 260.79 cm3/g. calculate delta U and delta H for the process?