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A mixture of helium and argon is stored in a spherical vessel 5 m in dia at 10-2 Pa and 300 K. The molar fractions of helium and argon are the same. Outside the vessel the environment is open space at a pressure much less than the vessel pressure. An orifice 50 mm in dia is suddenly open on the vessel. Assuming the temperature remains constant in time, calculate after 100 s since the orifice opening: the vessel pressure; the number densities and the molar fractions of argon and helium.

A mixture of helium and argon is stored in a spherical vessel 5 m in dia at 10-2 Pa and 300 K. The molar fractions of helium and argon are the same. Outside the vessel the environment is open space at a pressure much less than the vessel pressure. An orifice 50 mm in dia is suddenly open on the vessel. Assuming the temperature remains constant in time, calculate after 100 s since the orifice opening: the vessel pressure; the number densities and the molar fractions of argon and helium.

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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A mixture of helium and argon is stored in a spherical vessel 5 m in dia at 102 Pa and 300 K. The molar fractions of helium and argon are the same. Outside the vessel the environment is open space at a pressure much less than the vessel pressure. An orifice 50 mm in dia is suddenly open on the vessel. Assuming the temperature remains constant in time, calculate after 100 s since the orifice opening: the vessel pressure; the number densities and the molar fractions of argon and helium.
Transcribed Image Text:A mixture of helium and argon is stored in a spherical vessel 5 m in dia at 102 Pa and 300 K. The molar fractions of helium and argon are the same. Outside the vessel the environment is open space at a pressure much less than the vessel pressure. An orifice 50 mm in dia is suddenly open on the vessel. Assuming the temperature remains constant in time, calculate after 100 s since the orifice opening: the vessel pressure; the number densities and the molar fractions of argon and helium.
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