QUESTION $1$

A piston$-$cylinder device contains $3\mathrm{.}2f{t}^3$ of air at $66$ psia and $160$ F $.$ Heat is transferred to the air in the amount of $44$ Btu as the air expands isothermally. The amount of boundary

done during this process is $($in Btu$)?$

QUESTION $2$

A rigid $11-$L vessel initially contains a mixture of liquid water and vapor at $100$ C with $14\mathrm{.}1$ percent quality. The mixture is then heated until its temperature is $150$ C $.$ The heat transfer

required for this process $($in KJ $)$ is$?$