a) What is the force, in newtons, exerted on the gas by the atmosphere, the piston, and the weight? (as- sume no friction) b) What is the pressure of the gas in kPa c) If the gas in the cylinder is heated, it expands, pushing the piston and weight upward. If the piston and weight are raised 0.8 m, what is the work done by the gas in kJ? What is the change in potential energy of the piston and weight?

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
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A gas is confined in a 0.5 m diameter cylin- der by a piston, on which rests a weight. The mass of the piston and weight together is 150 kg. The local acceleration of gravity is 9.813 m s−2, and the atmo- spheric pressure is 101.57 kPa.

a) What is the force, in newtons, exerted on the gas by the atmosphere, the piston, and the weight? (as- sume no friction)

b) What is the pressure of the gas in kPa

c) If the gas in the cylinder is heated, it expands, pushing the piston and weight upward. If the piston and weight are raised 0.8 m, what is the work done by the gas in kJ? What is the change in potential energy of the piston and weight?

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