I have asked this question but it was rejected. I am submitting the problems to check my understanding. This problem is from an older exam that I am using as practice and I am not being graded on them.If you are able to, please state your assumptions and table. Hot combustion gases enter the nozzle of a turbojet engine at 250 kPa, 650°C, and 70 m/s and exit at80 kPa and 420°C. The mass flow rate is 1.2 kg/s. Assume the heat losses to the surroundings is 90kWand the surroundings is at 27°C. Determine (a) the exit velocity and (b) the decrease in the exergy ofthe gases. Take k = 1.3 and c, = 1.15 kJ/kg-°C for the combustion gases.

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Answered: Hot combustion gases enter the nozzle…

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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I have asked this question but it was rejected. I am submitting the problems to check my understanding. This problem is from an older exam that I am using as practice and I am not being graded on them.

If you are able to, please state your assumptions and table.

Hot combustion gases enter the nozzle of a turbojet engine at 250 kPa, 650°C, and 70 m/s and exit at
80 kPa and 420°C. The mass flow rate is 1.2 kg/s. Assume the heat losses to the surroundings is 90kW
and the surroundings is at 27°C. Determine (a) the exit velocity and (b) the decrease in the exergy of
the gases. Take k = 1.3 and c, = 1.15 kJ/kg-°C for the combustion gases.

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