Gas work and internal energy apparatus

The apparatus combines a cylindrical tank, a pressure gauge, a shut-off valve, a temperature sensor, a pump and an indicator cylinder on a vertical panel. With its help, six experiments are performed: heating the gas during compression, cooling during rapid expansion with the formation of fog in the tank, the dependence of the temperature increase on the final pressure, measuring the work of the gas by lifting the piston, comparing fast and slow changes in pressure and qualitatively checking the first law of thermodynamics in a closed cycle. The device is intended for demonstrations on molecular physics and thermodynamics in physics lessons.