The physical change in a substance directly between gas and solid without becoming a liquid.
The direct conversion of a solid to a gas is called sublimation. In this process, the solid phase skips the liquid phase and transforms directly into a gas when heated.
Sublimation of any pure substance such as ammonium chloride by definition is a physical change, because sublimation is defined as passage of substance from the solid to the gas phase without passing through an intermediate liquid phase.
I think the answer is sublimation
It is called sublimation.
Sublimation is a physical change.
Neither. Sublimation is a process.
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sublimation. for example when dry ice changes directly to a gas.
Sublimation = solid -> gas.
sublimation
another word for sublimation is deposition
Sublimation is accelerated at high temperature.