The temperature of a sample of liquid water changes from 50°C to 30°C. Which statement best explains the change that must happen at the molecular level?

A. The molecules move more quickly and their average kinetic energy increases.

B. The molecules move more slowly and their average kinetic energy decreases.

C. The molecules move more quickly and their average kinetic energy decreases.

D. The molecules move more slowly and their average kinetic energy increases

Question

Nia Donaldson

Chemistry

16 June, 12:33

The temperature of a sample of liquid water changes from 50°C to 30°C. Which statement best explains the change that must happen at the molecular level?

A. The molecules move more quickly and their average kinetic energy increases.

B. The molecules move more slowly and their average kinetic energy decreases.

C. The molecules move more quickly and their average kinetic energy decreases.

D. The molecules move more slowly and their average kinetic energy increases

+2

Answers (2)

Know the Answer?

Gaven Hopkins · Answer 1

B, because that is the definition for temperature. It's the average kinetic energy, so as temperature decreases so does the average kinetic energy of the molecules in the sample.

Skyler Lawrence · Answer 2

The correct answer is B based on my knowledge and research.