1.67. Given that a gas contained within a piston-cylinder assembly, initially at a volume of 0.4 m3, undergoes a constant-pressure expansion at 5 bar, while being slowly heated through the base of the cylinder. During this process, the total amount of heat transfer to the gas is 150 kJ and increase in potential energy of the piston is 75 kJ. The piston is fabricated from heat-resistant material and it moves smoothly in the cylinder so that there is no friction. Assume that the local atmospheric pressure is 1 bar. a. Find the final volume of the gas, in m3. b. Calculate the boundary work done by the gas, in kJ. c. If initial internal energy (U1) of the gas is 15 kJ, what will be its final internal energy (U2), in kJ?

1.67. Given that a gas contained within a piston-cylinder assembly, initially at a volume of 0.4 m3, undergoes a constant-pressure expansion at 5 bar, while being slowly heated through the base of the cylinder. During this process, the total amount of heat transfer to the gas is 150 kJ and increase in potential energy of the piston is 75 kJ. The piston is fabricated from heat-resistant material and it moves smoothly in the cylinder so that there is no friction. Assume that the local atmospheric pressure is 1 bar. a. Find the final volume of the gas, in m3. b. Calculate the boundary work done by the gas, in kJ. c. If initial internal energy (U1) of the gas is 15 kJ, what will be its final internal energy (U2), in kJ?

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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