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Nitrogen gas is confined in a cylinder and the pressure of the gas is maintained by a weight placed on the piston. The mass of the piston and the weight together is 100 kg. The acceleration due to gravity is 9.81 m/s? and the atmospheric pressure is 1.01325 bar. Assume frictionless piston. Determine: a) The force exerted by the atmosphere, the piston and the weight on the gas if the piston is 200 mm in diameter. b) The pressure of the gas. c) If the gas is allowed to expand pushing up the piston and the weight by 500 mm, what is the work done by the gas in kJ? d) What is the change in the potential energy of the piston and the weight after the expansion

Nitrogen gas is confined in a cylinder and the pressure of the gas is maintained by a weight placed on the piston. The mass of the piston and the weight together is 100 kg. The acceleration due to gravity is 9.81 m/s? and the atmospheric pressure is 1.01325 bar. Assume frictionless piston. Determine: a) The force exerted by the atmosphere, the piston and the weight on the gas if the piston is 200 mm in diameter. b) The pressure of the gas. c) If the gas is allowed to expand pushing up the piston and the weight by 500 mm, what is the work done by the gas in kJ? d) What is the change in the potential energy of the piston and the weight after the expansion

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Nitrogen gas is confined in a cylinder and the pressure of the gas is maintained by a weight placed on the piston. The mass of the piston and the weight together is 100 kg. The acceleration due to gravity is 9.81 m/s? and the atmospheric pressure is 1.01325 bar. Assume frictionless piston. Determine: (a) The force exerted by the atmosphere, the piston and the weight on the gas if the piston is 200 mm in diameter. (b) The pressure of the gas. (c) If the gas is allowed to expand pushing up the piston and the weight by 500 mm, what is the work done by the gas in kJ? (d) What is the change in the potential energy of the piston and the weight after the expansion in part (c)?
Transcribed Image Text:Nitrogen gas is confined in a cylinder and the pressure of the gas is maintained by a weight placed on the piston. The mass of the piston and the weight together is 100 kg. The acceleration due to gravity is 9.81 m/s? and the atmospheric pressure is 1.01325 bar. Assume frictionless piston. Determine: (a) The force exerted by the atmosphere, the piston and the weight on the gas if the piston is 200 mm in diameter. (b) The pressure of the gas. (c) If the gas is allowed to expand pushing up the piston and the weight by 500 mm, what is the work done by the gas in kJ? (d) What is the change in the potential energy of the piston and the weight after the expansion in part (c)?
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