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Q1: The gases in the cylinder of an internal combustion engine have a specific internal energy of 800 kJ/kg and specific volume of 0.06 m /kg at the beginning of expansion. The expansion of the gases may be assumed to take place according to a reversible law, pv= constant, from 55 bar to 1.4 bar. The specific internal energy after expansion is 230 kJ/kg. If the heat rejected to the cylinder cooling water or gases during the expansion stroke is 140 kj/kg. Calculate the final specific volume and the polytropic index(n).

Q1: The gases in the cylinder of an internal combustion engine have a specific internal energy of 800 kJ/kg and specific volume of 0.06 m /kg at the beginning of expansion. The expansion of the gases may be assumed to take place according to a reversible law, pv= constant, from 55 bar to 1.4 bar. The specific internal energy after expansion is 230 kJ/kg. If the heat rejected to the cylinder cooling water or gases during the expansion stroke is 140 kj/kg. Calculate the final specific volume and the polytropic index(n).

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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Q1: The gases in the cylinder of an internal combustion engine have a specific internal energy of 800 kJ/kg and specific volume of 0.06 m' /kg at the beginning of expansion. The expansion of the gases may be assumed to take place according to a reversible law, pv"= constant, from 55 bar to 1.4 bar. The specific internal energy after expansion is 230 kJ/kg. If the heat rejected to the cylinder cooling water or gases during the expansion stroke is 140 kj/kg. Calculate the final specific volume and the polytropic index(n).
Transcribed Image Text:Q1: The gases in the cylinder of an internal combustion engine have a specific internal energy of 800 kJ/kg and specific volume of 0.06 m' /kg at the beginning of expansion. The expansion of the gases may be assumed to take place according to a reversible law, pv"= constant, from 55 bar to 1.4 bar. The specific internal energy after expansion is 230 kJ/kg. If the heat rejected to the cylinder cooling water or gases during the expansion stroke is 140 kj/kg. Calculate the final specific volume and the polytropic index(n).
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