As part of an industrial process, air as an ideal gas at10 bar, 400 k expands at steady state through a valve to apressure of 4 bar. the mass flow rate of air is 0.5 kg/s. theair then passes through a heat exchanger where it is cooledto a temperature of 295 k with negligible change in pressure. the valve can be modeled as a throttling process, and kineticand potential energy effects can be neglected.(a) for a control volume enclosing the valve and heatexchanger and enough of the local surroundings that theheat transfer occurs at the ambient temperature of 295 k, determine the rate of entropy production, in kw/k.(b) if the expansion valve were replaced by an adiabaticturbine operating isentropically, what would be the entropyproduction, in kw/k? compare the results of parts (a) and (b) and discuss.