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AP® Chemistry

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Energy at a Particulate Level

APCHEM-KUMIZW

A liquid substance, like pure water, absorbs heat energy at room temperature.

Which of the following BEST describes what happens to the substance at a particulate level?

A

The particles in the substance begin to move faster in terms of rotational movement, causing an instantaneous increase in temperature.

B

The particles in the substance absorb the energy, resulting in more vibrational energy, which causes the temperature of the system to instantaneously increase.

C

The particles in the substance show a higher rate of translational energy due to the instantaneous change in temperature.

D

The particles in the substance absorb the initial energy in the form of heat and show no instantaneous sign of temperature change.