Suppose 1.000 mol argon (assumed to be an ideal gas) is confined in a strong, rigid container of volume 22.41 L at 273.15 K. The system is heated until 3.000 kJ (3000 J) of heat has been added. The molar heat capacity of the gas does not change during the heating and equals 12.47 J K-1 mol-1. (a) Calculate the original pressure inside the vessel (in atmospheres). (b) Determine q for the system during the heating process. (c) Determine w for the system during the heating process. (d) Compute the temperature of the gas after the heating, in degrees Celsius. Assume the container has zero heat сараcity. (e) Compute the pressure (in atmospheres) inside the ves- sel after the heating. (f) Compute AU of the gas during the heating process. (g) Compute AH of the gas during the heating process. (h) The correct answer to part (g) exceeds 3.000 kJ. The increase in enthalpy (which at one time was mislead- ingly called the “heat content") in this system exceeds the amount of heat actually added. Why is this not a violation of the law of conservation of energy?
Suppose 1.000 mol argon (assumed to be an ideal gas) is confined in a strong, rigid container of volume 22.41 L at 273.15 K. The system is heated until 3.000 kJ (3000 J) of heat has been added. The molar heat capacity of the gas does not change during the heating and equals 12.47 J K-1 mol-1. (a) Calculate the original pressure inside the vessel (in atmospheres). (b) Determine q for the system during the heating process. (c) Determine w for the system during the heating process. (d) Compute the temperature of the gas after the heating, in degrees Celsius. Assume the container has zero heat сараcity. (e) Compute the pressure (in atmospheres) inside the ves- sel after the heating. (f) Compute AU of the gas during the heating process. (g) Compute AH of the gas during the heating process. (h) The correct answer to part (g) exceeds 3.000 kJ. The increase in enthalpy (which at one time was mislead- ingly called the “heat content") in this system exceeds the amount of heat actually added. Why is this not a violation of the law of conservation of energy?
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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Transcribed Image Text:Suppose 1.000 mol argon (assumed to be an ideal gas) is
confined in a strong, rigid container of volume 22.41 L
at 273.15 K. The system is heated until 3.000 kJ (3000 J)
of heat has been added. The molar heat capacity of
the gas does not change during the heating and equals
12.47 J K-1 mol-1.
(a) Calculate the original pressure inside the vessel (in
atmospheres).
(b) Determine q for the system during the heating process.
(c) Determine w for the system during the heating process.
(d) Compute the temperature of the gas after the heating,
in degrees Celsius. Assume the container has zero heat
сараcity.
(e) Compute the pressure (in atmospheres) inside the ves-
sel after the heating.
(f) Compute AU of the gas during the heating process.
(g) Compute AH of the gas during the heating process.
(h) The correct answer to part (g) exceeds 3.000 kJ. The
increase in enthalpy (which at one time was mislead-
ingly called the “heat content") in this system exceeds
the amount of heat actually added. Why is this not a
violation of the law of conservation of energy?
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