$1\mathrm{.}19$ Three kg of saturated liquid water are to be evaporated at $60\backslash$deg C$.($a$)$ At what pressure will this occur at equilibrium? $($b$)$ What is the initial volume? $($c$)$ What is the system volume when $2$ kg have been evaporated? At this point, what is AU relative to the initial state? $($d$)$ What are AH and AU relative to the initial state for the process when all three kg have been evaporated? $($e$)$ Make a qualitative sketch of parts $($b$)$ through $($d$)$ on a P$-$V diagram, showing the phase envelope.