Question

What is the direct vaporization of a solid without passing through its liquid state called?

Answer 1

`"Sublimation"`

Explanation:

When a material sublimes, it undergoes the transition from the solid state directly to the gaseous state. A common material that sublimes at normal pressures is `"dry ice"`, i.e. `CO_2(g)`. In my very young days, I can remember ice cream sellers using blocks of dry ice to cool their ice creams; of course when the dry ice turned to gas it would not soak their stock.