Question

what are the charestic of chemical change​

Answer 1

Answer:

Some signs that a chemical change occurred include temperature increase, spontaneous change in color after mixing compounds, a marked odor after the reaction begins, formation of a precipitate in the solution and release of bubbles.

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Answer 2

Answer:

Explanation:

1) One or more new substances are formed in a chemical change.

(2) A chemical change is a permanent change. A chemical change usually cannot be reversed.

(3) A lot of energy (in the form of heat, light, etc.) is either absorbed or given out in a chemical change.

(4) Sound may be produced in a chemical change.

(5) A change in smell may take place or a new smell may be given off in a chemical change.

(6) A permanent change in colour may take place in a chemical change.

(7) A gas may be formed in a chemical change.

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