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Kinetic molecular theory Transitional Reasoning Practice

Chemistry · Matter · Chemistry · Particle Model of Matter

1 Chemistry practice questions on Kinetic molecular theory. Questions that build towards applied reasoning.

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  1. 1.

    Two identical rigid containers of equal volume contain equal molar amounts of two different ideal gases, Gas X and Gas Y, maintained at the same absolute temperature TT. The molar mass of Gas X is significantly lower than that of Gas Y (MX<MYM_X < M_Y). Based on the kinetic molecular theory, which of the following evaluations regarding the microscopic behavior of these gases is correct?

    • A) The average kinetic energy of the particles is identical in both containers, but the particles of Gas X have a higher average speed than those of Gas Y.
    • B) The particles of Gas Y possess a greater average kinetic energy because their individual molecular mass is larger.
    • C) Gas X exerts a higher pressure solely because each lighter particle transfers more momentum during an individual collision with the wall.
    • D) The frequency of particle collisions with the container walls is lower for Gas X because lighter gas particles occupy less total volume.

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