This would be a irreversible change. If you think about it, if you let the bread sit after being toasted it will not become un-toasted. It may become mushy after time but once you toast it its toast.
No
no
yes
chemical change is easily reversible whilst physical is not reversible
A reversible change is a change you can make, then put back, however a non-reversible change is a change you can make, then it will be stuck like that
the difference between a physical change and a chemical change is that a physical change is usually reversible whilst a chemical change is not reversible.
This is a physical change. You only change the shape and size of an apple by slicing it. Chemical changes would mean changing the molecular composition of the apple.
A physical change is reversible, a chemical change is not.
Slicing bread is a physical change, because each slice of bread has the same chemical composition as it had before it was sliced.
No, slicing bread is a physical change. The act of cutting the bread into smaller pieces does not alter its chemical composition.
It is a physical change
Yes
It is a physical change
Slicing bread is a physical change because it does not change the chemical composition of the bread.
No. It's because it can not be reversible.
That is a chemical change. Physical changes can be undone. Burning a bit of paper is another non-reversible change.
Baking bread is an irreversible change; there is no way to unbake bread. The baked bread cannot be converted back to the dough that it was before being baked.
ripping paper slicing bread trimming nails
Physical ------------------- It is a chemical change because some compounds from bread are thermally decomposed. The reaction is not reversible.
This is a physical change: the bread is not being chemically altered, and would have the same nutritional value whether eaten from the loaf or the slices. It would, however, be difficult to exactly reverse this physical change because of the nature of the product.