A piston$-$cylinder device initially contains $100kg$ of liquid water at $T=80C$ and $P=\frac{1}{b}ar.$ The device is isobarically heated, expanding against an external pressure of $\frac{1}{b}ar,$ until exactly $12\%$ of the water has vaporized, with the rest remaining in the liquid phase. How much heat was added?

a$.2.$ MJ

b$.35\mathrm{.}5MJ$

c$.7\mathrm{.}7MJ$

d$.37\mathrm{.}5MJ$

e$.$ Insufficient information to solve

Hide Feedback

Incorrect