Liquid water at $180\backslash$deg C and $1002\mathrm{.}7$ kPa has an internal energy $($on an arbitrary scale$)$ of $762\mathrm{.}0$ kJ$-$kg$-1$ and a specific volume of $1\mathrm{.}128$ cm$3-$g$-1.$

$($a$)$ What is its enthalpy?

$($b$)$ Water is brought to the vapor state at $300\backslash$deg C and $1500$ kPa, where its internal energy is $2784\mathrm{.}4$ kJ and its specific volume is $169\mathrm{.}7$ cm$3-$g$-1.$

Calculate AU and AH for the process