Chemistry

Chemistry, 08.07.2019 07:10, djmccarter

4. a cylinder with a piston originally contains 5.0 l of he gas at a temperature of
310 k. when the gas is cooled the piston moves and the new volume is 2.4 l.
what is the final temperature of the gas assuming that pressure and the number of
moles of he remains constant?

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Engineering, 14.09.2019 01:30, Calliedevore

Avertical piston-cylinder device initially contains 0.1 m3 of air at 400 k and 100 kpa. at this initial condition, the piston is resting on a stop. the piston-cylinder device is connected to a supply line with air at 400 k and a pressure of 500 kpa. the valve between the supply line and the piston-cylinder device is opened and is left open until the pressure in the piston-cylinder device reaches 500 kpa. the piston is observed to start moving when the pressure in the cylinder is 200 kpa and the piston continues to rise until it reaches a second stop. at the second stop, the piston-cylinder volume is 0.2 m3 . the final temperature and pressure in the piston-cylinder device are 440 k and 500 kpa, respectively. molecular weight of air = 28.97 kg/kmol. determine heat transfer (kj) during the entire process. indicate whether it is into the system or out of the system.

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Physics, 21.09.2019 01:30, Vauzh

Agas is contained in a vertical piston–cylinder assembly by a piston with a face area of 40 in2 and weight of 100 lbf. the atmosphere exerts a pressure of 14.7 lbf/in2 on top of the piston. a paddle wheel transfers 3 btu of energy to the gas during a process in which the elevation of the piston increases slowly by 1 ft. the piston and cylinder are poor thermal conductors, and friction between the piston and cylinder can be neglected. determine the work done by the gas on the piston, in btu, and the change in internal energy of the gas, in btu.

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Engineering, 03.10.2019 02:00, Briii582

Avertical piston-cylinder device initially contains 0.1 m3 of air at 400 k and 100 kpa. at this initial condition, the piston is resting on a stop. the piston-cylinder device is connected to a supply line with air at 400 k and a pressure of 500 kpa. the valve between the supply line and the piston-cylinder device is opened and is left open until the pressure in the piston-cylinder device reaches 500 kpa. the piston is observed to start moving when the pressure in the cylinder is 200 kpa and the piston continues to rise until it reaches a second stop. at the second stop, the piston-cylinder volume is 0.2 m3 . the final temperature and pressure in the piston-cylinder device are 440 k and 500 kpa, respectively. molecular weight of air = 28.97 kg/kmol. determine heat transfer (kj) during the entire process. indicate whether it is into the system or out of the system.

Answers: 1

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4. a cylinder with a piston originally contains 5.0 l of he gas at a temperature of
310 k. whe...

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