Multiple Choice
Which statement best describes the forces among the particles of an ideal gas according to the kinetic molecular theory?
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7. Gases
Kinetic Molecular Theory
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Which of the following is NOT a postulate of the kinetic molecular theory?
A
Gas particles experience strong attractive and repulsive forces between each other.
B
The average kinetic energy of gas particles is proportional to the absolute temperature.
C
The volume of individual gas particles is negligible compared to the volume of the container.
D
Gas particles are in constant, random motion.
Verified step by step guidance1
Recall that the kinetic molecular theory (KMT) describes the behavior of ideal gases based on several key postulates about gas particles.
Identify the main postulates of KMT: (1) Gas particles are in constant, random motion; (2) The volume of individual gas particles is negligible compared to the volume of the container; (3) Gas particles experience no significant attractive or repulsive forces between each other; (4) The average kinetic energy of gas particles is proportional to the absolute temperature.
Analyze the given options and compare each statement to the known postulates of KMT.
Notice that the statement 'Gas particles experience strong attractive and repulsive forces between each other' contradicts the KMT postulate that assumes negligible intermolecular forces.
Conclude that the statement about strong attractive and repulsive forces is NOT a postulate of the kinetic molecular theory.
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