A piston$-$cylinder assembly contains a two$-$phase liquid$-$vapor mixture of H$2$O at $300$ psi

with a quality of $70\%($state $1).$ The mixture is heated and expands at constant pressure

until a final temperature of $550$oF is reached $($state $2).$

a$)$ Determine the phase of water at the initial $(1)$ and final $(2)$ states.

b$)$ Sketch and label the process along a constant pressure line on a T$-$u diagram.

Be sure to sketch the line and the states relative to a $$saturation dome$.$

c$)$ Calculate the change in temperature $($T$2$ T$1$ in oF$)$ for the process.

d$)$ Calculate the change in specific internal energy $($u$2$ u$1$ in BTU$/$lb$)$ for the process.

e$)$ Determine the work for the process, w$12$ in BTU per lb of H$2$O present. Don$$t forget

to clearly indicate the direction of energy transfer due to work $($in or out of system$)$

too!