A piston–cylinder assembly contains 5.0 kg of air, initially at 2.0 bar, 30 oC. The air undergoes a process to a state where the pressure is 1.5 bar, during which the pressure–volume relationship is pV = constant. Assume ideal gas behavior for the air.  Determine the work and heat transfer, in kJ.

A piston-cylinder assembly contains 2 lb of water, initially at 100 lbf/in.² and 400°F. The water undergoes two processes in series: a constant-pressure process followed by a constant volume process. At the end of the constant-volume process, the temperature is 300°F and the water is a two-phase liquid-vapor mixture with a quality of 60%. Neglect kinetic and potential energy effects. Determine the work and heat transfer for each process, all in Btu. Part A Determine the work for the constant-pressure process, in Btu. W12-38.05 Your answer is correct. Hint Part B Your answer is correct. Determine the heat transfer for the constant-pressure process, in Btu. Q12--300.366 Part C Hint W23- Btu Determine the work for the constant volume process, in Btu. Save for Later Btu Btu Attempts: 2 of 4 used Attempts: 1 of 4 used Attempts: 0 of 4 used Submit Answer Part D The parts of this question must be completed in order. This part will be available when you complete the part above.

A piston-cylinder assembly contains Refrigerant 22, initially a saturated vapor at 5 bar. The refrigerant undergoes a process for which the pressure-specific volume relationship is pv = constant to a final pressure of 20 bar. Kinetic and potential energy effects can be neglected. a. For your schematic, provide a rough sketch of your system, with arrows indicating direction of work and heat (i.e, in or out of the system) b. Determine the work and heat transfer for the process, each in (kJ/kg)

A piston-cylinder assembly contains 2 lb of water, initially at 100 lbf/in.² and 400°F. The water undergoes two processes in series: a constant-pressure process followed by a constant volume process. At the end of the constant-volume process, the temperature is 300°F and the water is a two-phase liquid-vapor mixture with a quality of 60%. Neglect kinetic and potential energy effects. Determine the work and heat transfer for each process, all in Btu. Part A * Your answer is incorrect. Determine the work for the constant-pressure process, in Btu. W12= 38.65 Btu