$10-2$

A heat engine receives heat from a source at $1000$ K at a rate of $800$ kW $($

$=800$ kW$)$ and

rejects heat to a sink at $320$ K$.$ The engine is found to have a $2$nd law efficiency of $0\mathrm{.}7353.$

Calculate $($a$)$ the reversible power $[$in kW$],($b$)$ the useful power $[$in kW$],$ and $($c$)$ the rate of

irreversibility $[$in kW$]$