Problem $8.$ Superheated water vapor contained in a closed rigid container is

cooled from $600C$ and $22$ bar to $150C.$

a$)$ What property is constant between the initial and final state?

b$)$ Determine the pressure in the final state $($bar$).$

c$)$ Determine the heat transfer $(k\frac{J}{k}g).$

d$)$ Sketch the cooling process on p$-$v and T$-$v axes.