How do scientists know when a chemical change or chemical reaction has taken place.?

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asked Jul 24, 2017 172k views

2 Answers

Richardpringle · Answer 1 · 2017-07-25T23:20:57+0000

A chemical change is slightly the same as a chemical reaction. Except, the mass in a chemical reaction would be conserved, while in a chemical change, that may not happen.

Jic · Answer 2 · 2017-07-29T05:42:40+0000

One of the clues are that there will be a change in temperature. Usually when a reaction takes place heat will be absorbed or released resulting in a change of temperature. Hope this helped!

How do scientists know when a chemical change or chemical reaction has taken place.?

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