Making toast is a chemical reaction because you can't change it back into untoasted bread.
The drying of the bread is physical but the actual caramelization or darkening of the outer bread layer is a chemical change. The outer edges of the bread are beginning to char. Generally, a color change is an indicator of a chemical change.
"Becoming hot" is itself a physical change. It can sometimes be a sign of chemical change occurring, but in this case is simply the tranformation of kinetic (not chemical) energy to heat.
It is a chemical change because involve some chemical transformations as thermal degradation.
Toasting of bread is a chemical change.
It is a chemical change.
Heating is a physical change.
Physical change
it is a physical change
It is a chemical change. Look at the explanation below the picture of the rusting nail. With toast a new substance has been formed due to the heat which caused the chemical change.
in changes. Physical changes can be reversed. E.g. if you were to melt a block of ice, and then freeze it again, it would to some degree be reversed. This is a physical change. However, if you were to burn a peace of toast, the change would be chemical. Once the toast is burnt you cant get it back.
Chemical broooooooooooooooo niga
Iron rusting is a chemical change: oxidation of the metal by oxygen in the air or water. When iron 'rusts' it oxidises. This is a chemical change, a physical change is when a molecule changes state, for example iron melting and going from a solid to a liquid.
Chemical
Physical change.
it is a physical change
chemical
physical
it is a physical change
chemical change
Toasting bread represents a chemical change.
Chemical, because the disaccharide in toast when heated become hard thus giving you toast
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 would be a chemical change. The bread would be changed into carbon and the reaction can not be reversed.