b) Dissolution of a sugar cube in water is a physical change while burning a sugar cube is a
chemical change. Why?
Giyo two anplications of eynansion and contraction of materials
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Melting a sugar cube is a physical change because the substance is still sugar. Burning a sugar cube is a chemical change. Fire activates a chemical reaction between sugar and oxygen. The oxygen in the air reacts with the sugar and the chemical bonds are broken.
Explanation:
Why is burning sugar a chemical change?
Burning anything is a chemical change because burning is usually defined as the rapid combination of a substance with oxygen. In the process, new substances are formed and the old ones destroyed meaning chemical bonds were broken and made. That’s the very definition of a chemical change.
this are two applications of expansion of contraction of material
Applications of Expansion and Contraction
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