How can a cold solid turn into a gas? Skipping the liquid part?
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It’s a wonder that liquids can exist at all.
A gas exists when the molecules have so much energy that they aren’t sticking together, and instead freely bouncing around.
A solid exists when they have so little energy that they settle together into a dense array.
Liquids are in a strange in-between, where the molecules still mostly clump together but can’t quite settle down. This is only possible because of pressure. In low pressures, liquids turn to gas. If the pressure isn’t high enough for a particular material to exist as a liquid, then it skips that and becomes a gas.
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