Question

seperation of naphthalene from a mixture of naphthalene and sodium chloride is physical or chemical change?​

Answer 1

Explanation:

seperation of naphthalene from a mixture of naphthalene and sodium chloride chemical change

Answer 2

Seperation of naphthalene from a mixture of naphthalene and sodium chloride is physical or chemical change.

• The process of sublimation can be used to separate the mixture of naphthalene and sodium chloride because naphthalene is a sublime, meaning that it turns into a vapour without changing into a liquid and that its vapour changes into a solid without changing into a liquid, in contrast to sodium chloride, which is not a sublime.
• Sublimation is the process by which a solid transforms instantly into a gaseous state and then returns to a solid after cooling. Naphthalene sublimation involves a physical change in the state of matter.
• Naphthalene sublimation is a physical transformation because no new compounds are created throughout the process, and the chemical make-up of naphthalene does not change.
• There is no chemical reaction taking place, hence it is a physical change. The temperature of naphthalene rises, and finally it sublimates, but its chemical makeup does not change.

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