Refrigerant 134a enters an insulated diffuser as a saturated vapor at 60°F with a velocity of 1200 ft/s. The inlet area is 1.4 in?. At the exit, the pressure is 400 lbı/in? and the velocity is negligible. The diffuser operates at steady state and potential energy effects can be neglected. Determine the mass flow rate, in Ib/s, and the exit temperature, in °F. Step 1 Determine the mass flow rate, in Ib/s. Ib/s.

Calculate the energy requirement to raise the temperature of 1 kg of water from 60 ° C of water to 100 ° C using the following approach; a. Use of mean specific heat = .... kJ. b. Enthalpy change in water - vapor saturation table  = .... kJ.

Calculate the compressor work in kJ required to compress 1 kg of an ideal gas from an initial volume and pressure of 0.65m3 and 101.3kpa to a final pressure of 517kpa. Compression is with n=1.35. A. 133.6           B. 105.8            C. 148.3           D. 142.7

1.