Question

4. Describe an irreversible change that you can bring about by heating.

Answer 1

• A change that cannot be reversed or cannot get back to its original state is called an irreversible change.
• Heating can result in an irreversible change.
• For example, when raw food material gets heated, it turns into the cooked one.
• The cooked food cannot be reversed back to the raw ingredients.
• Hence, cooking food is an irreversible change that can occur by heating.