Unformatted text preview: 50 2000 250 0.01 500 0.5 333 777 0.5 0.5 4. A rigid container, of volume V = 0 . 1 m 3 , contains 1 kg of water. Initially the system is at a temperature of T 1 = 30 ◦ C. (a) What is the initial pressure and quality (if applicable) of the water? (b) Heat is now added to the container and the temperature increases. The process stops when the water exists as a single phase. What is the ﬁnal pressure? To work part b), you need to recognize the type of process going from the initial to the ﬁnal state. What property stays constant? 5. A mass of 1 kg of R–134a is contained in a rigid glass vessel of volume V = 0 . 05 m 3 . The system is initially at T 1 = 30 ◦ C. (a) What is the initial pressure of the R–134a? (b) The system is now cooled, and the process is stopped when liquid is ﬁrst observed to condense onto the glass. What is the ﬁnal temperature?...
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 Fall '11
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 Dynamics, 1 kg, 90%, 10 kg

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