1. A 454 gmole of an ideal gas is cooled reversibly at constant volume from (188°C, 2bar) to (18°C, Ibar). What are Q, W, AU and AH? (C, =20.9 J/mol K, C,=29.3 J/mol K)
1. A 454 gmole of an ideal gas is cooled reversibly at constant volume from (188°C, 2bar) to (18°C, Ibar). What are Q, W, AU and AH? (C, =20.9 J/mol K, C,=29.3 J/mol K)
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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SHEET NO..
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Ast. Professer A. N. AF-Masawi
Themodynamics
Year Chem Eng.
Sheet no.3
Ideal Gas
1. A 454 gmole of an ideal gas is cooled reversibly at constant volume from (188°C,
2bar) to (18°C, Ibar). What are Q, W, AU and AH?
(C, =20.9 J/mol K, C,=29.3 J/mol K)
an ideal gas
2. From
adiabatically to 5 bar. How much work is done on the gas?
(C.=20.9 J/mol K, C,=29.3J/mol K)
initial state of (18°C, lba
compressed reversibly and
3. Air at 115°C and 0.8 MPa expand reversibly at constant temperature, then cooled
at constant volume to 5°C and 0.2MPA. Suppose air is ideal gas, calculate work, heat,
transferred, and the internal energy of the entire process.
Specific heat of air C,-29.29 J/mol K, C, =20.92J/mol K
4. A rigid non conducting tank with a volume of 4m' is divided into two equal parts
by a thin membrane, On one side of membrane the tank contains N; gas at 5 bar and
80 °C, the other side is a perfect vacuum. The membrane rupture and the gas fills the
tank.
a) What is the final temperature and pressure of the gas?
b) How much work is done? Is the process reversible? Describe a reversible process
by which the gas can be returned to its initial state. How much work is done?
Assume N. an ideal gas with:
C,= 29.09 J/mol K
C= 20.785 J/mol K
II
...
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