Question

Liquefaction is a chemical change or Physical change ?​

Answer 1

Answer:

physical change because chemical is not around on physical change

Answer 2

Explanation:

, liquefaction[1] is a process that generates a liquid from a solid or a gas[2] or that generates a non-liquid phase which behaves in accordance with fluid dynamics.[3] It occurs both naturally and artificially. As an example of the latter, a "major commercial application of liquefaction is the liquefaction of air to allow separation of the constituents, such as oxygen, nitrogen, and the noble gases."[4] Another is the conversion of solid coal into a liquid form usable as a substitute for liquid fuels.[5]

Liquefaction is also used in commercial and industrial settings to refer to mechanical dissolution of a solid by mixing, grinding or blending with a liquid.