Compressed nitrogen is contained in a reservoir and must be expanded to a mach number of unity for an industrial cleaning process. if the pressure and temperature in the reservoir are 600 kpa and 293 k respectively, what is the exit pressure, temperature and the diameter of the nozzle outlet if the mass flow rate must be 1 kg/s? let γ = 1.4, r = 296.8 j/kgk.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?