There are four sketches below. The first sketch shows a sample of Substance X. T

Question

There are four sketches below. The first sketch shows a sample of Substance X. The three sketches underneath it show three different changes to the sample You must decide whether each of these changes is possible. If a change is possible, you must also decide whether it is a physical change or a chemical change Each sketch is drawn as if the sample were under a microscope so powerful that individual atoms could be seen. Also, you should assume that you can see the entire sample, and that the sample is in a sealed box, so that no matter can enter or leave Sample of Substance X Change 1 Change 2 Change 3 Change 1 is Change 2 is Change 3 is impossible a physical change impossible a physical change a chemical change impossible a physical change a chemical change a chemical change

Explanation / Answer

1) the first one is a chemical change

2) the second one is a physical change (separation)

3) the third one is a chemical change.(formation of compounds)

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