Why Sublimation is a physical change?
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Sublimation refers to physical changes of transition, and not to cases where solids convert into gas due to a chemical reaction. Because the physical change from a solid into a gas requires the addition of energy into the substance, it is an example of an endothermic change...
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Sublimation is the process in which camphor turns directly into the gas and it is a reversible change. So it is a physical change
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