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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.
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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 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
Ne Ar React 5 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
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.
He 1 gram Ne React 7 • What mass of neon is in the balloon? <1.0g 1.0g >1.0g VHe = VNe
He 1 gram Ne React 7 • Determine the mass of neon in the balloon. VHe = VNe