A mass of air (molecular mass equal to 28.97 g/mol) at 150 kPa and 27 ‰is contained in a frictionless piston-cylinder device. At the initial state, the piston is resting on a pair of stops and the total volume of occupied by the air is 400 L. The mass of the piston is such that a 350 kPa pressure is needed to move it. The air is now heated until its volume has doubled. Draw the process on the PV diagram. Determine: (a) the final temperature; (b) the work done by the air; and (c) the total heat added into the gas. (Hint: you might want to use Table I

Superheated steam at 1.0MPa and 300C inside a cylinder of volume 3.0 liters drives a piston in asteam locomotive cylinder. It expands isobarically. By what multiple can the volume grow before thesystem becomes a saturated liquid-gas mixture? At this point, how much boundary work will havebeen done on the piston?

There is 10-kg of water at room temperature and pressure in a closed piston-cylinder. Boundary work is then done on the system, compressing it until the volume decreases to one-half of it's original value. If the internal energy of the system decreases by 700 kJ/kg during this process and 200 kJ/kg of boundary work is done on the system, how much heat has been removed from the system, in kJ. Assume that system is sitting on a lab bench.How much heat is removed from the system, in kJ?

Refrigerant 134a expands in a piston-cylinder assembly from p₁ = 140 lb/in² and T₁ = 140°F to p₂ = 30 lb-/in² and T₂ = 80 °F. The mass of refrigerant is 0.46 lb. During the process, the work done by the refrigerant is 4.32 Btu. Kinetic and potential energy effects are negligible. Determine the initial volume of the refrigerant, V₁, in ft³, and the heat transfer for the process, in Btu. Step 1 Determine the initial volume of the refrigerant, V₁, in ft³. V₁= i Save for Later ft³ Attempts: 0 of 4 used Step 2 The parts of this question must be completed in order. This part will be available when you complete the part above. 4 Submit Answer