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Solved: Steam at 75 kPa and 8 percent quality is contained
Chapter 4, Problem 439(choose chapter or problem)
Steam at 75 kPa and 8 percent quality is contained in a spring-loaded pistoncylinder device, as shown in Fig. P439, with an initial volume of 2 m3 . Steam is now heated until its volume is 5 m3 and its pressure is 225 kPa. Determine the heat transferred to and the work produced by the steam during this process.
Questions & Answers
QUESTION:
Steam at 75 kPa and 8 percent quality is contained in a spring-loaded pistoncylinder device, as shown in Fig. P439, with an initial volume of 2 m3 . Steam is now heated until its volume is 5 m3 and its pressure is 225 kPa. Determine the heat transferred to and the work produced by the steam during this process.
ANSWER:Step 1 of 7
A saturated water mixture contained in a spring-loaded piston-cylinder device is heated until the pressure and volume rise to specified values. The heat transfer and the work done are to be determined.Refer to 
Assumptions are
1. The cylinder is stationary and thus the kinetic and potential energy changes are zero.
2. There are no work interactions involved other than the boundary work.
3. The thermal energy stored in the cylinder itself is negligible.
4. The compression or expansion process is quasi-equilibrium.