Alpha Geek
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Consider Problem 3.173. The final state was given, but you were not told that the piston hits the stops, only that Vstop = 2 V1. Sketch the possible P–v diagram for the process and determine which number(s) you need to uniquely place state 2 in the diagram. There is a kink in the process curve; what are the coordinates for that state? Write an expression for the work term.
Problem 3.173
A vertical cylinder fitted with a piston contains 5 kg of R-410a at 10â—¦C, as shown in Fig. P3.173. Heat is transferred to the system, causing the piston to rise until it reaches a set of stops, at which point the volume has doubled. Additional heat is transferred until the temperature inside reaches 50â—¦C, at which point the pressure inside the cylinder is 1.4 MPa. a. What is the quality at the initial state? b. Calculate the heat transfer for the overall process.
