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Lecture 5 Patial pressure and MOlecular Kinetic theory

# Lecture 5 Patial pressure and MOlecular Kinetic theory -...

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Gas volume at STP? STP: 0°C and 1 atm. Standard Temperature and Pressure 1 mole of ideal gas at STP is 22.42 L. The molar volume of an ideal gas at STP

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Molar Mass can be measured fr om Density of the gas http://college.cengage.com/chemistry/discipline/shared/fae/general/index.html ?layer=act&src=qtiwf_act035.1.xml
Dalton’s Law of Partial Pressures In 1803, John Dalton summarized his observation: For a mixture of gases in a container, the total pressure exerted is the sum of the pressure that each gas would exert if it were alone. P total = P1 +P2 +P3+……….

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Mole Fraction and Partial Press ure
Example

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Example 2
Example 2-continued

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So What? What does this law really mean??? And Why?
Consequences of the Dalton’s L aw 1. The pressure exerted by an ideal gas is n ot a function of the structure of the molec ules in the gas; 2. The volume of the gas molecules is not i mportant; 3. The forces between molecules in ideal ga s are not important. 4. Conclusion: We can treat molecules in an ideal gas as volume-less and non-interact ing particles.

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Kinetic Molecular Theory of Gas es
Random Movement of an Ideal Gas

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Lecture 5 Patial pressure and MOlecular Kinetic theory -...

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