A pistoncylinder device contains 005 kg of steam at 1 MPa an

A piston-cylinder device contains 0.05 kg of steam at 1 MPa and 300 °C. Steam now expands to a final state of 200 kPa and 150 °C, doing work. Assuming the surroundings to be at T0=25 °C and P0 = 100 kPa, determine If the exergy of the system has decreased or increased

Solution

Since the system has done some work, it\'s exergy has decreased.