Question

Which statement best describes what happens during a chemical change?

Answer 1

Answer:

Both the identity and the properties of a substance change.

Explanation:

During most chemical reactions, both the identity and the properties of substances changes. The chemical and physical properties of a substance often changes during this kind reaction.

A chemical change has the following properties:

• A new kind of substance forms.
• It is always accompanied by energy changes
• Involves a change in mass of the substance
• Considerable amount of energy is involved in this reaction.
• The process is irreversible