At about what temperature does the sample change phase? Justify your answer based on the cooling curve shown above.

A student states, “When the alcohol sample was at a temperature of 500 K, all the particles were moving faster than any of the particles were moving at
400 K" Do you agree or disagree with this student's statement? Justify your
answer.

This is very true

Explanation:

The kinetic energy in a system is directly proportional to the temperature of a system.

The higher the temperature, the faster the particles of a system will move. From the kinetic molecular theory, we see that the temperature of a system is a measure of the average kinetic energy of the molecules.

In chemical kinetics, as the temperature increases, the kinetic energy of the system also increases.

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