Air expands through a turbine operating at steady state. At the inlet, $p_1 = 150 \text{ lbf/in.}^2$, $T_1 = 1400^\circ \text{R}$, and at the exit, $p_2 = 14.8 \text{ lbf/in.}^2$, $T_2 = 800^\circ \text{R}$. The mass flow rate of air entering the turbine is $17 \text{ lb/s}$, and $65,000 \text{ Btu/h}$ of energy is rejected by heat transfer.
Neglecting kinetic and potential energy effects, determine the power developed, in hp.
$\dot{W}_{cv} = \boxed{i} \text{ hp}$