One-tenth kmol of carbon monoxide (CO) in a piston- cylinder assembly undergoes a process from p1 = 150 kPa, T1 = 300 K to p2 = 500 kPa, T2 = 370 K. For the process, W = -300 kJ. Employing the ideal gas model, determine: (a) the heat transfer, in kJ. (b) the change in entropy, in kJ/K.

Refrigerant 134a at p1 = 30 lbş/in?, T1 = 40°F enters a compressor operating at steady state with a mass flow rate of 250 lb/h and exits as saturated vapor at p2 = 160 lbę/in?. Heat transfer occurs from the compressor to its surroundings, which are at To = 40°F. Changes in kinetic and potential energy can be ignored. The power input to the compressor is 2.5 hp. Determine the heat transfer rate for the compressor, in Btu/hr, and the entropy production rate for the compressor, in Btu/hr-°R.

Five kilograms of a two-phase liquid-vapor mixture of water initially at 300\deg C and x1 = 0.5 is heated from the initial state to a saturated vapor state while the volume remains constant. The process is brought about by heat transfer from a thermal reservoir at 380\deg C. The temperature of the water at the location where the heat transfer occurs is 380\deg C.Let To = 300 K, Po = 1 bar, and ignore the effects of motion and gravity.

Five lbs of propane is contained in a closed, rigid tank initially at 80 lbf/in.2, 50°F. Heat transfer occurs until the final temperature in the tank is 0°F. Kinetic and potential energy effects are negligible. Determine the amount of energy transfer by heat, in Btu. Q= i Btu

X Your answer is incorrect. A rigid tank whose volume is 4 m³, initially containing air at 1 bar, 295 K, is connected by a valve to a large vessel holding air at 6 bar, 295 K. The valve is opened only as long as required to fill the tank with air to a pressure of 6 bar and a temperature of 350 K. Assuming the ideal gas model for the air, determine the heat transfer between the tank contents and the surroundings, in kJ. Qev = i 88.08 eTextbook and Media Hint Save for Later kJ Attempts: unlimited 4 Submit Answer