Question

If you toast a piece of bread then spread butter onto the warm piece of toast, what would be the physical change occurring? What would be the chemical change occurring? Write your answer in complete sentences

Answer 1

Answer:

Butter Melting is a Physical Change, Toasting bread is a Chemical Change

Explanation:

The spreading of butter on a toast, a hot surface would result in the butter being heated up and melted; resulting in a physical change

The heating of bread to make toast results in a chemical change as it cannot be formed back into bread.

Answer 2

Answer: I gotchu.

The physical change occuring would be the butter melting, because the butter is still butter, but it changed from a solid to a liquid. This is not the chemical change, because you can put melted butter in the fridge and it would be solid again. The chemical change that is occuring would be toasting the bread. This is because when you toast bread, you can't untoast it. It changed, the chemical status of the bread is now toast if that makes sense. The key thing to remember here is that a physical change can be undone whereas a chemical change cannot.

Explanation: