posted by astrid .
we did a bunsen burner lab where we burned paper clips. We burned it for about 10 seconds then cooled it in water. I know this is a physical change but i need to come up with 3 chemical changes that occured. I already came up with the water vapor that occurs when it cools down and i need two more examples.
Water vapor cooling is a physical change, not a chemical change.
Does combusting gas to CO2 and H2O count as a chemical change although it isn't part of the paper clip.
Did the paper clip change color upon heating? Isn't that a chemical change? What do you think the products were?