Question

please explain it in short.........​

Answer 1

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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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Answer 2

Answer:

Explanation:

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