QUESTION $5$

A reversible$-$adiabatic $($ideal$)$ compressor is used to deliver $2\mathrm{.}10k\frac{g}{m}in$ of high pressure air. At the compressor inlet, the air is at $100$ kPa and $26\mathrm{.}85C.$ The air exits the compressor at $629\mathrm{.}2$ kPa $.$ Determine the compressor exit temperature $C)$ if the air is modeled as an ideal gas with variable specific heats.

QUESTION $6$

An insulated mixing box in an air$-$conditioning system is used to mix two streams of refrigerant R$134$a to produce a single stream. The pressure of each stream is $6$ bar $.$ Inlet $1$ is a saturated vapor with a flow rate of $0\mathrm{.}391k\frac{g}{s},$ and inlet $2$ is at $43\mathrm{.}5C$ with a flow rate of $0\mathrm{.}113k\frac{g}{s}.$ Determine the rate of entropy production in the mixing box $($kW$/$K$).$ Assume steady state operating conditions prevail.

Note: Give your answer to six decimal places.