yoav Posted November 24, 2017 Posted November 24, 2017 (edited) hi guys anyone can help with this please? The painting describes an isolated system containing gas, with a floating piston. The system goes through the following process: the propeller works At a power of 1 kW for a minute and a half. The system volume varies from 30 liters to 90 liters, the initial pressure in the system is :accountant. 0.5 MPa A. Changing the energy of the system B. Changing the enthalpy of the system Edited November 24, 2017 by yoav
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