# Lesson_7 - Example 1 Lesson 7 Example 2 Lesson 7 Example 3...

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Lesson 7 Dalton’s Law

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Lesson 7 Dalton’s Law Different types of gases in a mixture act independently of each other V RT n P V RT n P B B A A = = , P A : partial pressure of gas A P B : partial pressure of gas B Partial pressures cannot be directly measured in a mixture of gases, but they are the pressures that each gas would have if present alone in a container of the same volume and temperature. ( 29 V RT n V RT n n P P P B A B A = + = + =
Lesson 7 Dalton’s Law Notice also that, A B A A A y n n n P P = + = Therefore, Dalton’s law can also be stated as: P A = y A P y A : molar fraction of gas A in the gas mixture

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Lesson 7

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Unformatted text preview: Example 1 Lesson 7 Example 2 Lesson 7 Example 3 The chemical composition of air that is exhaled is different from ordinary air. Is the density of expired air greater or less than that of ordinary air at the same temperature and pressure? (Calculate the density for both at Air Exhaled air M (g/mol) N 2 78.08 74.2 28 O 2 20.95 15.2 32 CO 2 0.036 3.8 44 H 2 O 5.9 18 Ar 0.93 0.9 40 Volumetric Analysis Lesson 7 Example 4 Lesson 7 Example 5 Lesson 7 Suggested readings 6.6 Mixtures of Gases...
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## This note was uploaded on 04/13/2009 for the course CHEMISTRY 102 taught by Professor Soares during the Spring '09 term at Waterloo.

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Lesson_7 - Example 1 Lesson 7 Example 2 Lesson 7 Example 3...

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