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Which of the following statements best describes why a chemical change is different from a physical change.

Group of answer choices

A) Chemical changes can only occur in a laboratory while physical changes can happen anywhere.

B) During a chemical change, you may see a change in color or temperature but physical changes will never change color or temperature.

C) Chemical changes involve formation of a new substance while physical change only impacts appearance or form.

D) Chemical changes impact appearance or form of a substance while physical changes affect the identity of the substance.

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Answer:

C) Chemical changes involve formation of a new substance while physical change only impacts appearance or form.

Explanation:

The obvious difference between a chemical change and physical change is that in a chemical change new substances are produced while in a physical change, the form of the compounds are altered.

  • Most phase changes are products of physical changes. Such changes are easily reversible.
  • In a chemical change, a new kind of matter is formed. It is accompanied by energy changes.
  • The process is not easily reversible.

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