A closed system undergoes an adiabatic process. During the process, the system operates at the same elevation and is at rest. The system internal energy between its initial and final states increased by 10KJ. Write the energy balance for this problem.

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Determine the work during the expansion of 0.5kg of air from 8 bar and 0.2m3/kg to 1bar according to pv 1.4=cte Present the process in pv Interpret the Labor sign Graph

Thermodynamics A Piston-Cylinder system initially contains R-134a refrigerant at a temperature of 2.8 bar and 40 C, and its initial volume is 0.1 m3. First, heat is transferred to the system by keeping the piston constant and this process is continued until the pressure is 3.2 bar. the process is maintained by allowing the volume to change. At the end of this process, the temperature reaches 50C. Assuming the state changes as if balanced, calculate the following: a)He amount of heat transferred during constant pressure operation b)Show the state changes on the P-v diagram.