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5–23 A piston-cylinder device contains 50 kg of water at 250 kPa and 25°C. The cross-sectional area of the piston is 0.1 m². Heat is now transferred to the water, causing part of it to evaporate and expand. When the volume reaches 0.2 m³, the piston reaches a linear spring whose spring constant is 100 kN/m. More heat is transferred to the water until the pis- ton rises 20 cm more. Determine (a) the final pressure and temperature and (b) the work done during this process. Also, show the process on a P-V diagram. Answers: (a) 450 kPa, 147.9°C, (b) 44.5 kJ A = 0.1 m² H20 m = 50 kg FIGURE P5–23

5–23 A piston-cylinder device contains 50 kg of water at 250 kPa and 25°C. The cross-sectional area of the piston is 0.1 m². Heat is now transferred to the water, causing part of it to evaporate and expand. When the volume reaches 0.2 m³, the piston reaches a linear spring whose spring constant is 100 kN/m. More heat is transferred to the water until the pis- ton rises 20 cm more. Determine (a) the final pressure and temperature and (b) the work done during this process. Also, show the process on a P-V diagram. Answers: (a) 450 kPa, 147.9°C, (b) 44.5 kJ A = 0.1 m² H20 m = 50 kg FIGURE P5–23

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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5-23 A piston-cylinder device contains 50 kg of water at 250 kPa and 25°C. The cross-sectional area of the piston is 0.1 m². Heat is now transferred to the water, causing part of it to evaporate and expand. When the volume reaches 0.2 m², the piston reaches a linear spring whose spring constant is 100 kN/m. More heat is transferred to the water until the pis- ton rises 20 cm more. Determine (a) the final pressure and temperature and (b) the work done during this process. Also, show the process on a P-V diagram. Answers: (a) 450 kPa, 147.9°C, (b) 44.5 kJ A = 0.1 m² H20 m = 50 kg FIGURE P5-23
Transcribed Image Text:5-23 A piston-cylinder device contains 50 kg of water at 250 kPa and 25°C. The cross-sectional area of the piston is 0.1 m². Heat is now transferred to the water, causing part of it to evaporate and expand. When the volume reaches 0.2 m², the piston reaches a linear spring whose spring constant is 100 kN/m. More heat is transferred to the water until the pis- ton rises 20 cm more. Determine (a) the final pressure and temperature and (b) the work done during this process. Also, show the process on a P-V diagram. Answers: (a) 450 kPa, 147.9°C, (b) 44.5 kJ A = 0.1 m² H20 m = 50 kg FIGURE P5-23
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