The density of the solid phase of a substance is 0.90 g/cm³ and the density of the liquid phase is 1.0 g/cm³. A large increase in pressure will A) lower the freezing point. B) lower the boiling point. C) lower the triple point. D) raise the triple point. E) raise the freezing point.

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Quizplus · Accepted Answer

EWhen pressure is increased, substances with a solid phase less dense than their liquid phase (like water, with ice being less dense than liquid water) will have their freezing point raised, not lowered. This is because applying pressure makes it more difficult for the substance to transition into the less dense solid phase, thus requiring a lower temperature to freeze. Conversely, the freezing point is raised because it now takes a colder temperature for the substance to solidify under the increased pressure.

The Density of the Solid Phase of a Substance Is