Question

melting of sugar is a chemical change why??​

Answer 1

Explanation:

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.

The chemical reaction for the burning of sugar by the body is shown through the chemical equation C12H22O11(s) + 12 O2(g) -----> 12 CO2(g) + 11 H2O(l).

In this equation, C12H22O11 is the sugar, which burns by reacting with the oxygen to create carbon dioxide and water.

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Answer 2

Answer:

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.