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At first it is a physical reaction. If you keep heating it it will undergo a chemical change. In fact, once it melts you have altered its chemical makeup (melting by itself is a physical change but in sugar that also marks a chemical change). Heat more and it undergoes another chemical change and goes from clear to brown another chemical change takes places. Eventually you can drive off (almost) all but the carbon atoms.
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Wiki User
∙ 14y ago
Wiki User
∙ 12y agoChemical Change. The nature of the sugar is permanently changed. Unlike melting ice to make water, and freezing water to make ice. You cannot reverse the process of turning Sugar into Caramel.
Wiki User
∙ 12y agoPhysical, no new substance is produced.
Wiki User
∙ 15y agoYes.
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