Question

Why might a physical change require energy?

Answer 1

Answer! !

During phase changes, energy

changes are usually involved.

For example, when solid dry

ice vaporizes (physical change),

carbon dioxide molecules absorb

energy. Meanwhile, when liquid

water becomes ice energy is

released. Remember that all

chemical reactions involve a

change in the bonds of the

reactants.

Answer 2

‼️BØÑJŌÙR ‼️

AnSwer...

Physical change requires Phase change .

For change of phase from solid→liquid→gas or vice versa energy is required as latent heat to change its state.

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