QUESTION $1$

$10$ points

Steam initially at $20$MPa,$T=498\mathrm{.}42C$ is expanded to $1\mathrm{.}1$ MPa at constant entropy. Compute final quality.

QUESTION $2$

$10$ points

Steam initially at $20$MPa,$T=848C$ is expanded to saturated vapor at $1\mathrm{.}2$ MPa $.$ Compute the change in enthalpy $(H,\frac{J}{g}).$

QUESTION $3$

$10$ points

Steam initially at $20$MPa,$T=637C$ is expanded to saturated vapor at $1\mathrm{.}8$ MPa $.$

Compute the change in entropy $(S,\frac{J}{g}-K)$

Dont assume anything use tables pleases