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18 December, 13:08

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?

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

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

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

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

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Answers (1)
  1. 18 December, 13:23
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    The molecules move more slowly and their average kinetic energy decreases.

    Step-by-step explanation:

    The temperature of a sample of liquid water changes from 50°C to 30°C.

    We know that as the temperature decreases the molecules of a substance decreases and the average kinetic energy also decrease.

    So, the molecules move more slowly and their average kinetic energy decreases. (Answer)
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