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

Q/ A radiator of steam heating system has a volume of 0.2 m'. When the radiator is filled with saturated steam at a pressure of 1.5 bar all valves are closed. After a period of time the pressure inside the radiator becomes 1.4 bar due to heat lost to surrounding air. Calculate: 1- mass of steam within the radiator. 2- mass and volume of liquid water at the final state. 3- mass and volume of vapor at the final state. From steam tables, at 1.5 bar, Since all valves are closed the specific volume of steam remains constant as heat is lost. At 1.4 bar, Since v2 < v g at 1.4 bar the steam becomes wet.

t = 135°C, h = 567.69 KJ/kg

Determine the quality of 290 kPa of steam when 570 kJ / kg of energy is lost from the saturated vapor.a. steam quality = ......%b. what is the temperature of the steam = ..... C