Refrigerant-134a enters the compressor of a refrigeration system as saturated vapor at 0.14 mpa and leaves as superheated vapor at 0.8 mpa and 60°c at a rate of 0.058 kg/s. determine the rates of energy transfers by mass into and out of the compressor. assume the kinetic and potential energies to be negligible. the enthalpies of refrigerant-134a at the inlet and the exit are 239.19 kj/kg and 296.82 kj/kg, respectively.

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

True or false (explain) (110)[111] is a slip system in bcc metals . the {111} family in fcc contains 8 planes. resolved shear stress (rss) in single crystals is just related to the applied stress. critical resolved shear stress (crss) in single crystal metals is direct proportional to the number of defects in the structure

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.