# ass2 - ENGRD 221: ENGINEERING THERMODYNAMICS Problem Set 2...

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ENGRD 221: E NGINEERING T HERMODYNAMICS Problem Set 2 Due: Feb 6 th 2009, Upson Room 123 (5 Questions) Question 1 (MS 3.14) : Determine the volume, in ft 3 , occupied by 2 lb of H 2 O at a pressure of 1000 lbf/in. 2 and (a) a temperature of 600°F. (b) a quality of 80%. (c) a temperature of 200°F. Question 2 (MS 3.59) : As shown in the figure below, a rigid, closed tank having a volume of 20 ft 3 and filled with 75 lb of Refrigerant 134a is exposed to the sun. At 9:00 AM, the refrigerant is at a pressure of 100 lbf/in. 2 . By 3:00 PM, owing to solar radiation, the refrigerant is a saturated vapor at a pressure greater than 100 lbf/in. 2 . For the refrigerant, determine (a) the initial temperature, in °F, (b) the final pressure in lbf/in. 2 , and (c) the heat transfer in Btu. Question 3 (MS 3.75): As shown in the figure below, a piston-cylinder assembly fitted with stops contains 0.1 kg of water, initially at 1 MPa, 500°C. The water undergoes two processes in series: Process 1-2: Constant-pressure cooling until the piston face rests against the stops. The volume

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## This note was uploaded on 03/15/2010 for the course ENGRD 2210 taught by Professor Torrance during the Spring '08 term at Cornell University (Engineering School).

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ass2 - ENGRD 221: ENGINEERING THERMODYNAMICS Problem Set 2...

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