Why Dry Ice Skips the Liquid Phase | The CO₂ Phase Diagram Secret

Why does dry ice never melt into a puddle? Because at everyday pressure, CO₂ has no liquid phase to melt into.

In this quick visual guide, read the CO₂ phase diagram. The triple point sits at 5.11 atm, far above the 1 atm of everyday life, so dry ice goes straight from solid to gas. To get liquid CO₂ at room temperature, you need about 64 atm, the pressure inside a fire extinguisher.

Perfect for chemistry students, teachers, and curious minds.

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