From the list below, select the extensive property

$($a$)$ Temperature

$($b$)$ Pressure

$($c$)$ Specific volume

$($d$)$ Mass

For a system operating in a thermodynamic cycle, the following relationship is valid

$($a$)Q^{}-W^{}=0$

$($b$)Q^{}-W^{}=U_2-U_1$

$($c$)Q^{}-W^{}+{\displaystyle \underset{in}{\overset{?}{}}}{m}^{}(h+\frac{V^2}{2}+zg)-{\displaystyle \underset{\text{o}\text{u}\text{t}}{\overset{?}{}}}{m}^{}(h+\frac{V^2}{2}+zg)=U_2-U_1$

$($d$)$ None

For which type of process for an ideal gas in a closed system can you use the following

equation to calculate the boundary work: $W_b=P_1{V}_{1}ln(\frac{V_2}{V_1})$

$($a$)$ Isobaric

$($b$)$ Isochoric

$($c$)$ Isothermal

$($d$)$ Isentropic

The $CO{P}_R$ of a reversible refrigerator is $10.$ Which of the following is impossible for a

process operating between the same temperature limits:

$($a$)CO{P}_R=9$ for an irreversible refrigerator

$($b$)CO{P}_{HP}=11$ for a reversible heat pump

$($c$)CO{P}_R=9\mathrm{.}5$ for a newly produced, efficient refrigerator

$($d$)CO{P}_R=12$ for an irreversible refrigerator