Air at 80 kpa and 127 c (static values) enters an adiabatic diffuser steadily at a rate of 6000 kg/h and leaves at 100 kpa. the velocity of the airstream is decreased from 250 to 30 m/s as it passes through the diffuser. find (a) the mach number at the inlet, (b) the exit temperature of the air and (c) the diffuser efficiency. | cp-1005//kg. k? k-1.4. r-287 j/kg. k

8.29 two streams containing pyridine and acetic acid at 25°c are mixed and fed into a heat exchanger. due to the heat-of-mixing effect, it is desired to reduce the temperature after mixing to 25°c using a stream of chilled ethylene glycol as indicated in the diagram. calculate the mass flow rate of ethylene glycol needed. the heat capacity of ethylene glycol at these conditions is approximately 2.8 kj/(kg k), and the enthalpy change of mixing (δmixh) is given below.