there are four sketches below. the first sketch shows a sample of substance x. the three sketches underneath…

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.\neach 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.\nsample of substance x\nchange 1\nchange 2\nchange 3\nchange 1 is:\nimpossible\na physical change\na chemical change\nchange 2 is:\nimpossible\na physical change\na chemical change\nchange 3 is:\nimpossible\na physical change\na chemical change

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.\neach 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.\nsample of substance x\nchange 1\nchange 2\nchange 3\nchange 1 is:\nimpossible\na physical change\na chemical change\nchange 2 is:\nimpossible\na physical change\na chemical change\nchange 3 is:\nimpossible\na physical change\na chemical change

Answer

Explanation:

Step1: Recall physical and chemical change definitions

Physical change: no new - substance formation, only state or arrangement change. Chemical change: new - substance formation, bonds break and form.

Step2: Analyze Change 1

The molecules in the original sample and in Change 1 are different. New molecules are formed, so it is a chemical change.

Step3: Analyze Change 2

The molecules are just more orderly arranged. No new substances are formed. It is a physical change.

Step4: Analyze Change 3

The molecules in the original sample and in Change 3 are the same. Only their positions have changed. It is a physical change.

Answer:

Change 1 is: a chemical change Change 2 is: a physical change Change 3 is: a physical change