n an air compressor, the compression takes place at constant internal energy, and 50 kJ of heat is rejected to the cooling water for every one kilogram of air. Find the work required for the compression.
In an air compressor, the compression takes place at constant internal energy, and 50 kJ of heat is rejected to the cooling water for every one kilogram of air. Find the work required for the compression.
2- In a compression stroke of a gas engine, the work done on the gas by the piston is 70 kJ and the heat rejected to the cooling water is 42 kJ. Find the change of the internal energy. Stating whether it is gain or lost.
3- A mass of gas with an initial internal energy of 1500 kJ, is contained in a cylinder which has perfectly thermal insulated. The gas is allowed to expand behind a piston until its internal energy is 1400 kJ. Calculate the work done by the gas. If the expansion follows a lawPV2=C and the internal energy is changed. The initial pressure and volume are 28 bar and 0.06 m3 respectively. Calculate the final pressure and volume.
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