Is the production of heat or light evidence that a chemical change may have occurred?

1 Answer
Darshan Senthil
Nov 4, 2016

Yes

Explanation:

More often than not, if something gives off large amounts of heat and light, it signifies a breaking of bonds, which releases energy in the form of heat and light.

Burning is a good example of this - light is given off, and there's some heat too.

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