Kinetic Molecular Theory

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Kinetic Molecular Theory

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Presentation transcript:

Kinetic Molecular Theory

Kinetic Molecular Theory So far we have considered “what happens,” but not “why.” In science, “what” always comes before “why.”

Kinetic Molecular Theory Assumptions: Gas particles are in rapid motion, colliding with container walls.

Kinetic Molecular Theory

Kinetic Molecular Theory Assumptions: Gas particles have negligible size compared to the distances between them.

Kinetic Molecular Theory Animation: Visualizing Molecular Motion (many molecules)

Kinetic Molecular Theory Assumptions: Gas particles have no attraction for one another.

Kinetic Molecular Theory Assumptions: Absolute temperature of the gas is a measure of the average kinetic energy of the gas particles.

Kinetic Molecular Theory Animation: Kinetic Molecular Theory/Heat-Transfer

Molecular View of The Ideal Gas Law

React 5 Ne Ar VNe = 2VAr Which of the following best represents the mass ratio of Ne:Ar in the balloons? 1:1 1:2 2:1 1:3 3:1

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React 6 On a beautiful autumn day in Champaign, IL, you are holding two balloons, each with 15 mol of gas. Which balloon is larger? The one filled with neon gas. The one filled with argon gas.

React 6 On a beautiful autumn day in Champaign, IL, you are holding two balloons, each with 15 mol of gas. Estimate the volume of each balloon.

VHe = VNe React 7 He 1 gram Ne What mass of neon is in the balloon?

VHe = VNe React 7 He 1 gram Ne Determine the mass of neon in the balloon.