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

Chemistry

Cristian Perez

26 May, 12:00

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

+3

Answers (2)

Know the Answer?

Phoenix Kirk · Answer 1

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

Allisson Savage · Answer 2

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.