CHM ENG 141 Midterm: cheme141-fa2007-mt1-Maboudian-soln
8 Jan 2019
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Closed book and notes (20 points: consider 1 mole of an ideal gas with constant heat capacities. For each of the following processes, deduce which of the listed properties or quantities remain constant and check those boxes. (cid:1)t (cid:1)p (cid:1)v. 0 (20 points: in state 1, a piston-cylinder assembly contains 3 kg of saturated steam of quality 0. 1 at. Heat is added at constant pressure while the piston moves outward. This continues until it reaches state 2 where the quality is 0. 3, at which point the piston becomes stuck and cannot move any further. Heat continues to be added at constant volume until the pressure reaches 133. 90 kpa (state 3): sketch qualitatively the path on a pv diagram. Label each state 1, 2, and 3: using the attached data for saturated steam, calculate the quality of the steam at final state (state 3), calculate the net heat added to the system.
