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.
<u>Water turns to steam when boiled over a Bunsen burner </u><u>Physical change</u>
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 → H₂O
<u>Carbon combines with oxygen to form carbon dioxide gas </u><u>Chemical change</u>
This is a typical chemical change":
C + O₂ → CO₂
A new product is formed and this reaction is not easily reversible.
<u>Water breaks down into hydrogen and oxygen gases. </u><u>Chemical change</u>
This is also a chemical change in which new products are formed:
H₂O → H₂ + O₂
<u>Limestone breaks down into lime and carbon dioxide when heated</u><u> Chemical change</u>
This is a chemical change as new product forms:
CaCO₃ → CaO + CO₂
Learn more:
Chemical change brainly.com/question/9388643
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