4.21. The rigid vessel shown in Fig. 4.16 has a volume of 1 ft³ and contains an ideal gas. The temperature is 100°F. The input to the heater is regulated to hold the temperature constant at 100°F. Originally it is at a pressure of 100 psia. The valve is partly opened, and the gas is allowed to escape slowly. When the pressure in the vessel has fallen to 20 psia, the valve is closed. How much heat was added by the heater during this period?
4.21. The rigid vessel shown in Fig. 4.16 has a volume of 1 ft³ and contains an ideal gas. The temperature is 100°F. The input to the heater is regulated to hold the temperature constant at 100°F. Originally it is at a pressure of 100 psia. The valve is partly opened, and the gas is allowed to escape slowly. When the pressure in the vessel has fallen to 20 psia, the valve is closed. How much heat was added by the heater during this period?
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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Transcribed Image Text:closed when the tank pressure reached 300 kPa bsolute?
4.21. The rigid vessel shown in Fig. 4.16 has a volume of 1 ft³ and contains an ideal gas.
The temperature is 100°F. The input to the heater is regulated to hold the
temperature constant at 100°F. Originally it is at a pressure of 100 psia. The valve
is partly opened, and the gas is allowed to escape slowly. When the pressure in
the vessel has fallen to 20 psia, the valve is closed. How much heat was added by
the heater during this period?
Heater
Valve
.…...
FIGURE 4.16
Expert Solution
Step 1
Given data are a follows:
Initial volume of vessel = 1 ft3.
Initial pressure of vessel = 100 psia
Initial temperature of vessel = 100oF.
Final pressure of vessel = 20 psia
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