How could you describe the changes that happen when carbon changes form from graphite to diamond -it is a chemical change, but the intensive and extensive properties of carbon will be maintained
-it is a physical change, but the intensive and extensive properties of carbon will be maintained
-it is a chemical change, which could change some of the intensive and extensive properties of the carbon
-it is a physical change, which could change some of the intensive and extensive properties of the carbon

The correct answer is: it is a chemical change, which could change some of the intensive and extensive properties of the carbon.

To answer this question, we must bear in mind that a chemical change involves the breaking of bonds in a substance and subsequent rearrangement of atoms to form a new substance.

This is why we say that in a chemical change, new substances are formed. Another name for a chemical change is a chemical reaction.

Having said that, it is clear that as graphite changes to diamond, bonds are broken and carbon atoms are rearranged.

This rearrangement of atoms leads to different intensive and extensive properties for graphite and diamond. For instance, graphite conducts electricity but diamond does not conduct electricity. Also, diamond is much denser and harder than graphite. A physical change can not lead to change in  some of the intensive and extensive properties of the carbon.

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