Question

It is important to understand the differences between chemical and physical changes. Chemical changes result in new substances, but physical changes do not. Which process is an example of a physical change?
F) Water turns to steam when boiled over a Bunsen burner.

G) Carbon combines with oxygen to form carbon dioxide gas.

H) Water breaks down into hydrogen and oxygen gases.

I) Limestone breaks down into lime and carbon dioxide when heated.

Answer 1

Explanation:

Other characteristics of these changes are:

Physical changes are easily reversible but chemical changes are not.

Physical changes involves no change in mass like chemical changes.

Physical changes require little energy unlike chemical changes.

Water turns to steam when boiled over a Bunsen burner   Physical change

This is a physical change of state. It is called evaporation. Here, hydrogen bonds between each water molecules are broken and they turn to gases in steam phase.

                    H₂O$_{l}$    →      H₂O$_{g}$

Carbon combines with oxygen to form carbon dioxide gas Chemical change

This is a typical chemical change":

            C   + O₂   →    CO₂

A new product is formed and this reaction is not easily reversible.

Water breaks down into hydrogen and oxygen gases.   Chemical change

This is also a chemical change in which new products are formed:

                      H₂O  →   H₂   +   O₂

Limestone breaks down into lime and carbon dioxide when heated Chemical change

This is a chemical change as new product forms:

                    CaCO₃   →  CaO + CO₂

Learn more:

Chemical change brainly.com/question/9388643

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