Kinetic Molecular Theory Kinetic Molecular Theory l So

Kinetic Molecular Theory

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

Kinetic Molecular Theory Assumptions: 1. Gas particles are in rapid motion, colliding with container walls.

Kinetic Molecular Theory

Kinetic Molecular Theory Assumptions: 2. Gas particles have negligible size compared to the distances between them.

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

Kinetic Molecular Theory Assumptions: 3. Gas particles have no attraction for one another.

Kinetic Molecular Theory Assumptions: 4. Absolute temperature of the gas is a measure of the average kinetic energy of the gas particles.

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

Molecular View of The Ideal Gas Law

5 t eac R VNe = 2 VAr 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 Ne Ar

Video: Collapsing Can

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

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

7 t eac R VHe = VNe l What mass of neon is in the balloon? <1. 0 g >1. 0 g He 1 gram Ne

7 t eac R VHe = VNe l Determine the mass of neon in the balloon. He 1 gram Ne