Problems1. A rigid tank whose volume is unknown is divided into two parts by apartition. One side of the tank contains an ideal gas at 927 C. The other sideis evacuated and has a volume twice the size of the part containing the gas.The partition is now removed and the gas expands to fill the entire tank.Heat is now applied to the gas until the pressure equals the initial pressure.Determine the final temperature of the gas.Ans. 3327 "CEvautedFig. 12. A tank contains helium at 37 C and 140 kPa gage. The helium is heated in aprocess by heat transfer from the surroundings such that the helium reachesa final equilibrium state at 200°C. Determine the final gage pressure of thehelium. Assume atmospheric pressure is 100 kPa.3. Air in a spring-loaded piston/cylinder setup has a pressure that is linear withvolume, P= A + BV. With an initial state of P-150 kPa, V =1 L and a finalstate of 800 kPa, V =1.5 L. Find the work done by the air.4. A piston/cylinder contains 2 kg of water at 20 C with a volume of 0.1m'. Bymistake someone locks the piston, preventing it from moving while we heatthe water to saturated vapor. Find the final temperature and volume and theprocess work.5. The piston/cylinder as shown in figure 2 contains 0.1 kg water at 500 C,1000 kPa. The piston has a stop at half of the original volume. The waternow cools to a room temperature of 25 C. a. Sketch the possible water statesin a P-v diagram. b. Find the final pressure and volume. c. Find the work inthe process.6. Two kilograms of water is contained in a piston/cylinder as shown in figure3 with a massless piston loaded with a linear spring and the outsideatmosphere. Initially the spring force is zero and PI = P0=100 kPa with avolume of 0.2 m'. If the piston just hits the upper stops, the volume is 0.8 mand T = 600 C. Heat is now added until the pressure reaches 1.2 MPa. Showthe P-V diagram, and find the work and heat transfer for the process.PoFig. 2Fig. 3

Question 1 Initial temperature T1 = 927 C Initial volume is V1 Evacuated volume is 2V1 Note : As per…

A rigid tank whose volume is unknown is divided into two parts by a partition. One side of the tank contains an ideal gas at 927'C. The other side is evacuated and has a volume twice the size of the part containing the gas. The partition is now removed and the gas expands to fill the entire tank. Heat is now applied to the gas until the pressure equals the initial pressure. Determine the final temperature of the gas.

A rigid tank whose volume is unknown is divided into two parts by a partition. One side of the tank contains an ideal gas at 927'C. The other side is evacuated and has a volume twice the size of the part containing the gas. The partition is now removed and the gas expands to fill the entire tank. Heat is now applied to the gas until the pressure equals the initial pressure. Determine the final temperature of the gas.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter1: Heat, Temperature, And Pressure

Section: Chapter Questions

Problem 6RQ: One British thermal unit will raise the temperature of _____ 1b of water _____F.

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