28. Consider the phase diagram shown. Choose the statement below that is FALSE.

Question

28. Consider the phase diagram shown. Choose the statement below that is FALSE. atm LIQUID 9 2 5.1 SOLID atm GAS atm 78.5 °C-56.7 °C Temperature (not to scale) 31°? A) The triple point of this substance occurs at a temperature of -56.7°C. B) The solid phase of this substance is more dense than the liquid phase. C) The substance undergoes vaporization at 1 atm when the temperature is increased along line B. The line separating the liquid and gas phases represents can be used to determine the boiling point at a specified pressure. E) The substance does not have a normal boiling point.

Explanation / Answer

False statement : option C

The substance DOES NOT undergo vaporization at 1 atm when the temperature is increased along line B.

Vaporization happen when the molecules of liquid goes to vapor phase.

Here the molecules of soild is going directly into gas phase skipping the liquid phase in between. The process by which molecules of soild go directly into gas phase is called sublimation.

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