Question

The change of soild state directly to gaseous state is called

Answer 1

Answer:

Sublimation is the process of transformation directly from the solid phase to the gaseous phase, without passing through an intermediate liquid phase.

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Answer 2

Answer:

Sublimation is the process of transformation directly from the solid phase to the gaseous phase, without passing through an intermediate liquid phase. It is an endothermic phase transition that occurs at temperatures and pressures below a substance’s triple point (the temperature and pressure at which all three phases coexist) in its phase diagram.

At a given temperature, most chemical compounds and elements can possess one of the three different states of matter at different pressures. In these cases, the transition from the solid to the gaseous state requires an intermediate liquid state. But at temperatures below that of the triple point, a decrease in pressure will result in a phase transition directly from the solid to the gaseous. Also, at pressures below the triple point pressure, an increase in temperature will result in a solid being converted to gas without passing through the liquid region.