202GasMixtures

# 202GasMixtures - Daltons Law Lesson 7 Daltons Law Different...

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Lesson 7 1 Lesson 7 Dalton’s Law 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. 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 2 Lesson 7 Example 1 Two grams of He and 2.00 g of H 2 are placed in a 15 L container at 30 °C. What are their partial pressures and the total pressure? Lesson 7 Example 2 You have a 5 L container of oxygen at 2.51 atm, a 4 L container of nitrogen at 0.792 atm and a 3 L container of argon at 1.23 atm. You connect all
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## This note was uploaded on 11/29/2011 for the course CHE 102 taught by Professor Simon during the Fall '08 term at Waterloo.

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202GasMixtures - Daltons Law Lesson 7 Daltons Law Different...

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