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Question number 116 attempts to make a connection between the properties of gases, liquids, and solids, and the kinetic molecular theory.
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As you recall, the kinetic molecular theory was used in order to explain the properties of gases.
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It can also be helpful understanding the motion of the molecules to explain the properties of liquids and solids.
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The first statement that you are asked to explain using the kinetic molecular theory is that the ease of compressibility decreases from a gas to a liquid to a solid.
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And we can explain this in terms of the distance between the molecules and their kinetic energies using the kinetic molecular theory because this theory would suggest that the molecules are farthest apart in a gas and closest to each other in a solid.
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Therefore, there's more distance between the molecules in a gas, so as you apply a pressure, you can compress a gas because you can decrease that distance between molecules that exist.
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But there's very little distance between molecules in a solid, so you can't compress the solid anymore and make the molecules any closer.
01:20
The next statement is solids retain a definite shape, but g acids and liquid, do not...