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Gases are one of three basic forms of matter, in which the molecules are in constant random motion. <ref>The American Heritage. (2002). Student Science Dictionary Houghton Mifflin, Boston.</ref> In fact, the relatively large distance between molecules suggest intermolecular forces have little influence on the motion of the molecules.

Observable characteristics of a gas: <ref>Cool School</ref>

  • Gases have no definite shape or volume
  • Gases are compressible
  • Gases diffuse rapidly
  • Gases have low density
  • Gases exert pressure

Major Topics

  1. Kinetic Molecular Theory
  2. Pressure
  3. Diffusion
  4. Gas laws
  5. STP
  6. Temperature scale conversions
  7. Absolute zero

Sample Test Questions
A weather balloon with a 2-meter diameter at ambient temperature holds 525 grams of helium. What type of electronic probe could be used to determine the pressure inside the balloon?
A. barometric
B. thermometric
C. calorimetric
D. spectrophotometric

Gases and Their Properties (Standards: CH4. a-f)

The kinetic molecular theory describes the motion of atoms and molecules and explains the properties of gases.

CH4 Framework
CH4 Vocabulary
CH4 Lecture Notes
CH4 Labs and Activities
CH4 Homework
CH4 Sample Test Questions
CH4 Cram Sheet


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