As the temperature of a liquid increases, its density:

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Multiple Choice

As the temperature of a liquid increases, its density:

Explanation:
Rising temperature makes a liquid expand. As the molecules move faster, they push farther apart, so the same amount of mass takes up a larger volume. Since density is mass per unit volume, it drops as temperature goes up. This is described by the liquid’s positive coefficient of thermal expansion. There is a notable exception with water: around 4°C water is densest, and its density decreases as it warms above that, so the relationship isn’t universal for all substances. But for most liquids, density decreases when temperature increases.

Rising temperature makes a liquid expand. As the molecules move faster, they push farther apart, so the same amount of mass takes up a larger volume. Since density is mass per unit volume, it drops as temperature goes up. This is described by the liquid’s positive coefficient of thermal expansion. There is a notable exception with water: around 4°C water is densest, and its density decreases as it warms above that, so the relationship isn’t universal for all substances. But for most liquids, density decreases when temperature increases.

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