10 mol of an ideal gas with Cy = 20.8 J/mol · K at T, = 300 K and p. = 0.3 MPa occupy the left half of an insulated vessel, as shown in Fig. A. The other half is evacuated. At time t = 0, a 1 kW electrical heating element is turned on. After 30 seconds, the partition dividing the vessel ruptures and the heating element is turned off. Calculate : (a) The final temperature and pressure of the gas in the vessel. (b) The entropy change of the gas during this process.

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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10 mol of an ideal gas with Cy = 20.8 J/mol · K at T, = 300 K and p. =
0.3 MPa occupy the left half of an insulated vessel, as shown in Fig. A. The
other half is evacuated. At time t = 0, a 1 kW electrical heating element is
turned on. After 30 seconds, the partition dividing the vessel ruptures and the
heating element is turned off. Calculate :
(a) The final temperature and pressure of the gas in the vessel.
(b) The entropy change of the gas during this process.
Transcribed Image Text:10 mol of an ideal gas with Cy = 20.8 J/mol · K at T, = 300 K and p. = 0.3 MPa occupy the left half of an insulated vessel, as shown in Fig. A. The other half is evacuated. At time t = 0, a 1 kW electrical heating element is turned on. After 30 seconds, the partition dividing the vessel ruptures and the heating element is turned off. Calculate : (a) The final temperature and pressure of the gas in the vessel. (b) The entropy change of the gas during this process.
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