A piston/cylinder setup, shown in Fig. P3.238, contains

Chapter 3, Problem 238HP

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Problem 238HP

A piston/cylinder setup, shown in Fig. P3.238, contains R-410a at −20°C, x = 20%. The volume is 0.2 m3. It is known that Vstop = 0.4 m3, and if the piston sits at the bottom, the spring force balances the other loads on the piston. The system is now heated to 20°C. Find the mass of the fluid and show the Pv diagram. Find the work and heat transfer.

FIGURE P3.238

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