A student places a single drop of food coloring into two identical beakers containing the same volume of pure water, one maintained at 20 °C and the other at 80 °C, without stirring either liquid. Within two minutes, the color completely disperses throughout the 80 °C beaker, whereas it spreads much more slowly in the 20 °C beaker. Based on the particle model of matter, which explanation best accounts for this observed difference?

A) Individual water particles expand and grow larger at higher temperatures, which physically forces the dye molecules apart more quickly.

B) Higher temperature corresponds to a greater average kinetic energy of the particles, causing more rapid collisions that disperse the dye faster.

C) Heating creates new water particles inside the beaker, generating extra fluid pressure that pushes the food coloring through the liquid.

D) The food coloring particles lose their mass in warm water, allowing them to drift freely without colliding with water particles.

Particle motion and temperature Transitional Reasoning Practice

Chemistry · Matter · Chemistry · Particle Model of Matter

1 Chemistry practice questions on Particle motion and temperature. Questions that build towards applied reasoning.

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Matter · Chemistry

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