Chapter 5, Problem 5.3P

During an isentropic process of 3 lb/sec of air, the temperature increases from 50 deg F to 290 deg F. Find the work for a steady flow process. O-134416.8 BTU/s O-143416.8 BTU/s O-199.28 BTU/s O -172.74 BTU/s

Steam is expanded isentropically in a turbine from 800 kPa, 250 °C to 200 kPa. How much work is done in this process per kg of water?

A pressure cooker 6 litres in volume contains 5 kg of water, where the liquid is in equilibrium with the vapour above it, at 30°C. The cooker with its lid closed and weight on, is heated until the vapour produced results in an increase in pressure, and the weight just lifts up at 2 bar. i. If the flame heating the cooker is at 400°C, calculate the entropy generation due to the external irreversibility. Calculate the heat transferred in the process. ii. Assume that the heating of water is reversible; neglect heating of the cooker body; assume heat transfer to water takes place at its average temperature for the above process. Use property data given below.