A vertical piston-cylinder assembly with a piston of mass 20 kg and having a face area of 40 cm² contains air. The mass of air is 2.5 g, and initially the air occupies a volume of 2.5 liters. The atmosphere exerts a pressure of 100 kPa on the top of the piston. The volume of the air slowly decreases to 0.001 m³ as energy with a magnitude of 1 kJ is slowly removed by heat transfer. Friction between the piston and the cylinder wall can be neglected and g = 9.8 m/s². Determine the work done by the air on the piston during the process, in kJ, and the change in specific internal energy of the air, in kJ/kg.
A vertical piston-cylinder assembly with a piston of mass 20 kg and having a face area of 40 cm² contains air. The mass of air is 2.5 g, and initially the air occupies a volume of 2.5 liters. The atmosphere exerts a pressure of 100 kPa on the top of the piston. The volume of the air slowly decreases to 0.001 m³ as energy with a magnitude of 1 kJ is slowly removed by heat transfer. Friction between the piston and the cylinder wall can be neglected and g = 9.8 m/s². Determine the work done by the air on the piston during the process, in kJ, and the change in specific internal energy of the air, in kJ/kg.
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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Transcribed Image Text:A vertical piston-cylinder assembly with a piston of mass 20 kg and having a face area of 40 cm² contains air. The mass of air is 2.5 g,
and initially the air occupies a volume of 2.5 liters. The atmosphere exerts a pressure of 100 kPa on the top of the piston. The volume
of the air slowly decreases to 0.001 m³ as energy with a magnitude of 1 kJ is slowly removed by heat transfer. Friction between the
piston and the cylinder wall can be neglected and g = 9.8 m/s².
Determine the work done by the air on the piston during the process, in kJ, and the change in specific internal energy of the air, in
kJ/kg.
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