Identify the postulate(s) which help to formulate a mathematical model of gases.i) A finite volume of gas consists of very large number of moleculesii) The size of the molecules is much smaller than the separation between molecules.iii) Molecules do not exert force on each other except during a collision.
Correct answer: B. I, II and III
- A. I only
- B. I, II and III
- C. III only
- D. I and II only
Explanation
All three postulates are foundational to the Kinetic Theory of Gases. They allow for a simplified mathematical model by treating gas molecules as numerous, non-interacting point masses that are in constant, random motion.
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About Kinetic Molecular Theory
Kinetic molecular theory explains gases as rapidly moving particles separated by large distances, with negligible volume and negligible intermolecular attraction in the ideal model. It relates temperature to average kinetic energy and explains gas pressure, Boyle's and Charles's laws, diffusion, effusion and the conditions under which real gases deviate from ideal behavior.
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Identify the postulate(s) that help to formulate a mathematical model of gases:I. A finite volume of gas consists of a very large number of molecules.II. The size of the molecules is much smaller than the separation between molecules.III. Molecules do not exert force on each other except during a collision.