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2.13 Air at 30°C and 2MPA flows at steady state in a horizontal pipeline with a velocity of 25 m/s. It passes through a throttle valve where the pressure is reduced to 0.3 MPa. The pipe is the same diameter upstream and downstream of the valve. What is the outlet temperature and velocity of the gas? Assume air is an ideal gas with a temperature-independent Cp=7R/2, and the average molecular weight of air is 28.8. %3D

2.13 Air at 30°C and 2MPA flows at steady state in a horizontal pipeline with a velocity of 25 m/s. It passes through a throttle valve where the pressure is reduced to 0.3 MPa. The pipe is the same diameter upstream and downstream of the valve. What is the outlet temperature and velocity of the gas? Assume air is an ideal gas with a temperature-independent Cp=7R/2, and the average molecular weight of air is 28.8. %3D

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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Answer are the outlet temperature is 289k 

and the velocity is 159m/s 

can you please explain how we go these answers 

removal 2.13 Air at 30°C and 2MPA flows at steady state in a horizontal pipeline with a velocity of 25 m/s. It passes through a throttle valve where the pressure is reduced to 0.3 MPa. The pipe is the same diameter upstream and downstream of the valve. What is the outlet temperature and velocity of the gas? Assume air is an ideal gas with a temperature-independent Cp=7R/2, and the average molecular weight of air is 28.8.
Transcribed Image Text:removal 2.13 Air at 30°C and 2MPA flows at steady state in a horizontal pipeline with a velocity of 25 m/s. It passes through a throttle valve where the pressure is reduced to 0.3 MPa. The pipe is the same diameter upstream and downstream of the valve. What is the outlet temperature and velocity of the gas? Assume air is an ideal gas with a temperature-independent Cp=7R/2, and the average molecular weight of air is 28.8.
Expert Solution
Step 1

Given:

At initial condition:

P=2 MPaT=30°CV=25 m/s

At final condition:

P=0.3 MPa

Outlet velocity and outlet temperature ?

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