Multiple Choice
According to the kinetic molecular theory, what happens to gas molecules when their kinetic energy decreases?
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7. Gases
Kinetic Molecular Theory
Multiple Choice
Which of the following is a postulate of the kinetic-molecular theory?
A
The volume of gas particles is significant compared to the total volume of the gas.
B
Gas particles experience strong attractive forces between each other.
C
Gas particles lose energy during elastic collisions.
D
Gas particles are in constant, random motion.
Verified step by step guidance1
Recall that the kinetic-molecular theory explains the behavior of ideal gases by making several key assumptions or postulates about gas particles.
Identify the main postulates of the kinetic-molecular theory, which include: gas particles are very small compared to the distances between them, gas particles are in constant, random motion, collisions between gas particles are perfectly elastic (meaning no net loss of kinetic energy), and there are no significant attractive or repulsive forces between particles.
Evaluate each given statement against these postulates: the volume of gas particles is negligible compared to the total volume of the gas (not significant), gas particles do not experience strong attractive forces, and collisions are elastic (no energy lost).
Recognize that the statement 'Gas particles are in constant, random motion' aligns directly with one of the fundamental postulates of the kinetic-molecular theory.
Conclude that the correct postulate from the options provided is that gas particles are in constant, random motion.
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