Journal Entry:

Which assumption of the Kinetic Molecular Theory of Gases accounts for the observation that real gases are not as compressible as ideal gases (in other words, the volume of real gases is often higher than predicted for a given temperature at high)?
(A) Gases consist of many particles moving randomly and continuously through space.
(B) The volume of gas particles is negligible compared to the distance between them.
(C) Collision between particles are completely elastic.
(D) The average kinetic energy of the molecules depends only on the temperature.

All gases can be condensed to form liquids. Which of the following assumptions of the Kinetic Molecular Theory of Gases is most directly challenged by this observation.
(A) Collision between particles are completely elastic.
(B) The volume of gas particles is negligible compared to the distance between them.
(C) Attractive forces are weak and negligible.
(D) The average kinetic energy of the molecules depends only on the temperature.

Learning Intentions

• We will learn the four parts to the kinetic molecular theory. 

• We will learn what factors affect effusion, diffusion and particle speed in a gas sample.

• We will learn how to create and analyze a phase diagram that graphs pressures and temperatures of substances.

Closing Task:

You can analyze data from a phase diagram.

You can make predictions about effusion and diffusion rate of various substances.

Content Standards being covered:

The gaseous state can be effectively modeled with a mathematical equation relating various macroscopic properties. A gas has neither a definite volume nor a definite shape, because the effects of attractive forces are minimal, we usually assume that the particles move independently. (E.K. 2.A.2)