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A piston/cylinder contains 0.5 kg argon and 0.5 kg hydrogen at 300 K, 100 kPa. The mixture is compressed in an adiabatic process to 400 kPa by an external force
To what temperature should the water be heated to lift the piston? If it is heated to saturated vapor find the final temperature, volume, and the heat transfer.
A piston/cylinder contains 2 lbm of liquid water at 70 F, and 30 lbf/in.2. There is a linear spring mounted on the piston such that when the water is heated
A piston/cylinder contains 2 kg water at 5 MPa, 800°C. The piston is loaded so pressure is proportional to volume, P = CV.
A piston/cylinder contains 2 kg water at 200°C, 10 MPa. The piston is slowly moved to expand the water in an isothermal process to a pressure of 200 kPa
A piston/cylinder contains 10 lbm of butane gas at 900 R, 750 lbf/in 2. The butane expands in a reversible polytropic process with polytropic exponent
A piston/cylinder contains 1 kg water at 20oC with volume 0.1 m3. By mistake someone locks the piston preventing it from moving while we heat the water
A piston/cylinder contains 2 kg of air at 27?C, 200 kPa, shown in Fig. The piston is loaded with a linear spring, mass and the atmosphere
A piston/cylinder arrangement contains 1 kg of water, shown in Fig. The piston is spring loaded and initially rests on some stops
A piston cylinder contains 1 kg water at 20oC with a constant load on the piston such that the pressure is 250 kPa
A piston cylinder contains 0.5 kg air at 500 kPa, 500 K. The air expands in a process so P is linearly decreasing with volume to a final state of 100 kPa
A piston cylinder contains 0.1 kg air at 100 kPa, 400 K which goes through a polytropic compression process with n = 1.3 to a pressure of 300 kPa.
A pipe, cross sectional area 0.1 m2, carries a flow of 75% O2 and 25% N2 by mole with a velocity of 25 m/s at 200 kPa, 290 K
A pipe flows water at 15oC from one building to another. In the winter time the pipe loses an estimated 500 W of heat transfer. What is the minimum required
A piston, mp= 5 kg, is fitted in a cylinder, A = 15 cm2, that contains a gas. The setup is in a centrifuge that creates an acceleration of 25 m/s2
A piston, mp = 10 lbm, is fitted in a cylinder, A = 2.5 in 2, that contains a gas. The setup is in a centrifuge that creates an acceleration of 75 ft/s2
A piston cylinder has R-134a at -20oC, 100 kPa which is compressed to 500 kPa in a reversible adiabatic process.
A piston cylinder has constant pressure of 2000 kPa with water at 20oC. It is now heated up to 100oC. Find the heat transfer and the entropy change
A piston cylinder has 2.5 kg ammonia at 50 kPa, -20oC. Now it is heated to 50oC at constant pressure through the bottom of the cylinder from external hot gas
A piston cylinder contains air at 600 kPa, 290 K and a volume of 0.01 m3. A constant pressure process gives 54 kJ of work out. Find the final temperature
A nonlinear spring has the force versus displacement relation of F = kns(x - x0) n. If the spring end is moved to x1 from the relaxed state
A nitrogen line, 540 R, and 75 lbf/in 2, is connected to a turbine that exhausts to a closed initially empty tank of 2000 ft3.
A mixture that is 20 percent carbon dioxide, 10 percent oxygen, and 70 percent nitrogen by volume undergoes a process from 300 K and 100 kPa
A Pennsylvania coal contains 74.2% C, 5.1% H, 6.7% O, (dry basis, mass percent) plus ash and small percentages of N and S.
A paper mill has two steam generators, one at 4.5 MPa, 300°C and one at 8 MPa, 500°C. Each generator feeds a turbine, both of which have an exhaust pressure