Question

The atoms and molecules in a gas are in constant motion. Temperature is a measure of their speed as they move. How are these related? (2 points)

As temperature decreases, the molecules and atoms move faster.

As temperature decreases, the molecules and atoms move at the same speed.

As temperature increases, the atoms and molecules move more slowly.

As temperature increases, the molecules and atoms move faster.

Atoms and molecules always move at the same speed regardless of any temperature change.

Answer 1

As temperature increases, the molecules and atoms move faster.

According to the Kinetic Molecular Theory of gases, the average kinetic energy (KE) of the molecules is proportional to the Kelvin temperature.

KE = ½ mv²

Thus, if T increases, KE increases and so does the speed (v) of the particles.