Determine the heat transfer rate of the nozzle per kg of

Question

Carbon dioxide (CO₂) at 50 MPa and 207°C is expanded isothermally through an uninsulated nozzle to 1.50 MPa in a steady state, steady flow process. There is no change in potential energy across the nozzle, and the surface temperature of the nozzle is 307°C. The entropy production rate magnitude in this problem can be taken to be 10% of the absolute value of the heat transfer rate. Assuming the CO₂ to be a constant specific heat ideal gas, determine

a. The heat transfer rate of the nozzle per kg of CO₂ flowing.

b. The change in kinetic energy of the CO₂ across the nozzle per kg of CO₂ flowing.