Question

explain the change of heat energy in a physical change.? ​

Answer 1

As temperatures increase, additional heat energy is applied to the constituent parts of a solid, which causes additional molecular motion. ... A gaseous state exists when molecules have absorbed so much heat energy due to increased temperatures that they are free to move around one another at high speeds.

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Answer 2

Answer:

A chemical reaction or physical change is exothermic if heat is released by the system into the surroundings. Because the surroundings is gaining heat from the system, the temperature of the surroundings increases. ... For example, when solid dry ice vaporizes (physical change), carbon dioxide molecules absorb energy.

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