Answer
Option (e) $1542$ kW
Work Step by Step
Solved by EES Software. Solutions can be verified by copying-and-pasting the following lines on a blank EES screen.
$P_1=4000$ "kPa"
$T_1=500$ "C"
$P_2=100$ "kPa"
$x_2=1$
$m=2$ "kg/s"
$h_1=$ENTHALPY(Steam_IAPWS,$T=T_1,P=P_1$)
$h_2=$ENTHALPY(Steam_IAPWS,$x=x_2,P=P_2$)
$W_{\text{out}}=m*(h_1-h_2)$
Option (e) $1542$ kW is correct.
