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12 August, 19:22

When substances change into new substances, the process must involve:

a physical change

a chemical change

heat being produced

heat being absorbed

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Answers (2)
  1. 12 August, 22:34
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    A chemical change ...
  2. 12 August, 22:59
    0
    Answer is a chemical change.

    As a result of a chemical reaction, a substance is changed into new substances which involves a chemical change.

    During a chemical reaction, atoms of a molecule within a substance are rearranged into different combinations by combining with the atoms of another substance to form new substances.

    An example of a chemical change is the composition of sodium chloride (salt) where the atoms of sodium and chlorine combine and rearrange themselves to form salt.
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