Chapter 5.5 The Kinetic Molecular Theory: A Model for Gas Behavior

Question 1

Kinetic - Molecular Theory

Answer 1

explains macroscopic gas behavior at the level of individual particles

Question 2

Postulates of the Kinetic - Molecular Theory:

Postulates 1. Particle Volume

Answer 2

the volume of each particle is so small compared w/ the volume of the whole sample that is assumed to be zero

Question 3

Postulates of the Kinetic - Molecular Theory:

Postulates 2. Particle Motion

Answer 3

the particles are in constant, random, straight - line motion, except when they collide w/ each other of their container

Question 4

Postulates of the Kinetic - Molecular Theory:

Postulates 3. Particle Collision

Answer 4

the collisions are elastic, so their total kinetic energy (Ek) is constant

Question 5

Relationship between Average Kinetic Energy and Absolute Temperature

Answer 5

the average kinetic energy of the molecules in proportional to the absolute temperature:
Ēk ∝ T or Ēk = cT

at any given temperature, all gases have the same average kinetic energy

Question 6

Kinetic Energy of an Object

Answer 6

Ek = (1/2) mass x speed^2