Problem: The density of a substance is greater in its solid phase than in its liquid phase.If the triple point in the phase diagram of the substance is below 1.0 atm, then which will necessarily be at a lower temperature, the triple point or the normal melting point?

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We are asked to identify which will have a lower temperature: the triple point or the normal melting point, considering that the solid phase is denser than the liquid phase.

We are given the information that the triple point exists at a pressure below 1 atm.

Recall that:

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Problem Details

The density of a substance is greater in its solid phase than in its liquid phase.

If the triple point in the phase diagram of the substance is below 1.0 atm, then which will necessarily be at a lower temperature, the triple point or the normal melting point?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Phase Diagram concept. You can view video lessons to learn Phase Diagram. Or if you need more Phase Diagram practice, you can also practice Phase Diagram practice problems.