HW $29($ii$)($See HW$-20($ii$))$

A rigid and externally well$-$insulated rigid tank of volume

$1\mathrm{.}7$ m $3$ initially contains air at an absolute pressure of $5$ bar

and an absolute temperature of $320$ K $($State $1).$ A valve

connected to the tank is opened and air exits the tank until

the air inside the tank is at an absolute pressure of $2$ bar

and an absolute temperature of $320$ K $($State $2).$ The

absolute temperature of air is maintained constant at $320$ K

throughout the process by an electric resistor that is

supplied with a current of $100$ A across a voltage

difference of $12$ V$.$ Assume that the pressure of air at the

exit of the valve is $1$ bar.

Calculate the entropy generation during the process, in

kJ$/$K