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Chemical change: the composition of the initial reactants is changed.
Ex.: thermal decomposition of calcium carbonate.
Physical change: the composition is not changed during this transformation.
Ex.: boiling of water.
Wiki User
∙ 11y ago
Wiki User
∙ 12y agophysical change is when the physical appearance (shape) of the object changes and the shape can be undone.
- if you have a paper clip, you can bend its shape, and you are able to make it go back to its original form.
chemical change is when the object changes chemically and the change can not be undone.
- if you make a cake from scratch and you bake it, after it is made, you can't separate the cake back into just the milk, or just the eggs.
Wiki User
∙ 11y agophysical and chemical depends if it is physical and chemical change. if it is that it deals with science because physical change is when it does not change by chemical. for example burning a piece of paper is physical change. Chemical change is when a substance is changed by a chemical.
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A physical change
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Chemical science, because yeast is irreversible. Chemical Change: Irreversible Physical Change: Reversible
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What do u mean by chemical or physical reaction... Please give me an answer so i can give you the answer.
