When carbon powder is heated....?

why is it, that the mass of a crucible with carbon powder inside it, still the same after it was heated?


and after it was heated, a new product was created, so my other question is, why did this new porduct still had the same mass with that of the carbon powder which was not yet heated?


and last question is, why is it important to palce that new product inside a dessicator? whats the use of it?





thanks:)When carbon powder is heated....?
If it was just pure carbon powder in the crucible, then after it was heated you would still just have the same amount of pure carbon. Though it's probably in a different physical form (allotrope) - there are at least nine, all of which have identical chemistry.


Unless some material was added or taken away, the mass would remain the same regardless of the physical form.


The dessicator - it could be to keep water in the air from reacting with the hot carbon, may produce carbon monoxide and acetylene.