【Daily Question】Theoretical Foundation 2019.11.12
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True or False: The solubility of gases decreases as temperature increases, and increases as pressure increases. ( ) Answer: Correct Hint: An additional reward will be given to those who can explain the solution process; the answer can be seen in the response!
Correct. The higher the temperature, the more intense the thermal motion of the molecules, and the greater their kinetic energy. The gas, which was previously bound by water molecules, has more energy available to escape and do work. For example, when heating cold water, bubbles can be seen rising from the water even before it boils – that’s how it works. When considering a gas as molecules with very large distances between them, an increase in pressure reduces the spacing between these gas molecules. As a result, more molecules can fit into the same volume, and consequently the solubility increases.