QUESTION $1$

A $9m^3$ container is filled with $320$ kg of R $-134$a at $8$ C $.$ What is the enthalpy $($in $K\frac{J}{k}g)$ of the R $-134$a in the container?

QUESTION $2$

"Refrigerant$-134$a is compressed by an adiabatic compressor from the saturated vapor state at $0\mathrm{.}16$ MPa to $1\mathrm{.}6$ MPa and $70$ C at a rate of $0\mathrm{.}118k\frac{g}{s}.$ The power input $($in kW $,$ a positive number$)$ to the compressor is$?"$

QUESTION $3$

"A heat pump absorbs heat from the cold outdoors at $3$ C and supplies heat to a house at $26$ C at a rate of $30000k\frac{J}{h}.$ If the power consumed by the heat pump is $2\mathrm{.}8$ kW $,$ the coefficient of performance of the heat pump is$?"$

$$

QUESTION $4$

"A heat engine cycle is executed with steam in the saturation dome $($on or under the curve$).$ The pressure of steam is $2$ MPa during heat addition, and $0\mathrm{.}1$ MPa during heat rejection. The highest possible efficiency $($in decimals $-$ do not write $5\%,$ write as $0\mathrm{.}05)$ of this heat engine is $?"$