chemical
It is kind of both....The chemical: The toast loses its water molecules and so loses most of its H2O.The Physical: The toast becomes hard and crunchy from soft and airy.Added:The toast burning is a total physical change, not chemical. Water loss from the toast is not a chemical change as species have not changed partners ( atoms have not rearranged into new species ) and H2O remains the molecule H2O, water.
It is kind of both....The chemical: The toast loses its water molecules and so loses most of its H2O.The Physical: The toast becomes hard and crunchy from soft and airy.Added:The toast burning is a total physical change, not chemical. Water loss from the toast is not a chemical change as species have not changed partners ( atoms have not rearranged into new species ) and H2O remains the molecule H2O, water.
Burning toast is a CHEMICAL change. A physical change is reversable-for example, you can freeze water into a cube and then defrost and reconvert to water. Burning is always a chemical change. In order for something to burn, some of the original substance must be lost and therefore cannot be turned back into its original form
it is a physical change
It is a chemical process.
Physical change.
Chemical
Burning is an irreversible change.
physical
Burning is a chemical change.
it is a physical change