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in this video weamp;#39;re going to talk about the difference between a physical change and a chemical change when a physical change occurs the chemical identity remains the same you still have the same substance but when you have a chemical change the chemical identity of the substance actually changes you have a new chemical formula now letamp;#39;s say if you have a piece of paper and you crumple it is that a physical change or a chemical change crumpling paper is a physical change itamp;#39;s still paper the substance is still the same you havenamp;#39;t changed the identity of the substance so that makes it a physical change now letamp;#39;s say if you were to uh burn paper if you took a lighter and you burn paper the paper will eventually disappear it will turn into carbon dioxide and water vapor so in this case the chemical identity of the paper is changing itamp;#39;s changing into a new substance into water and carbon dioxide so burning paper is a chemical change now wha
