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patriot [66]
2 years ago
11

The average kinetic energy of water molecules increases when -

Chemistry
1 answer:
lianna [129]2 years ago
8 0
Answer: option <span>C: H2O(l) at 10°C changes to H2O(l) at 20°C
</span>

Explanation:

To solve this questions use the fact the temperature is a measure of the average kinetic energy of the particles of a substance.

For a given substance, the higher the temperature the higher kinetic energy, the lower the temperature the lower the kinetic energy


That is a statement derived from the kinetic theory.

The kinetic energy states that as the temperature of a substance increases, so do the average velocity of its particles and so the average kinetic energy.

Thas is why gases have a higher kinetic energy than liquids and liquids have a higher kinetic energy than solids.

The options A<span>: H2O(s) changes to H2O(l) at 0°C and B: H2O(l) changes to H2O(s) at 0°C describe changes at constant temperature, so in them the  average kinetic energy does not change.</span><span>
</span><span>
</span><span>The option C: H2O(l) at 10°C changes to H2O(l) at 20°C, as said, is the right answer because it is a process in which the temperature is increasing, so the average kinetiic energy is also increasing.</span><span>
</span><span>
</span><span>The option D: H2O(l) at 20°C changes to H2O(l) at 10°C corresponds to a decrease of the kinetic energy, since the temperature is decreasing.
</span><span>
</span>
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