Africtionless piston–cylinder device contains 4 kg of nitrogen at 100 kpa and 250 k. nitrogen is now compressed slowly according to the relation pv1.4 = constant until it reaches a final temperature of 450 k. calculate the work input during this process. the gas constant for nitrogen is r = 0.2968 kj/kg·k.

What precautions should you take to prevent injuries when dealing with heavy loads?

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

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.