It would be a chemical change/reaction.
Toasting bread is a chemical reaction.
its a chemical reaction because you cannot undo it
no don't be silly. it is a physical change because you are able to change it back to its original state. :)
chemical
No, it is not.
Toasting bread is a chemical reaction.
a chemical reaction
its a chemical reaction because you cannot undo it
A chemical reaction is irreversible, while a physical change is reversible. Fire is a chemical reaction because you can't get back the products.
Gas is not prepared from sand.
If it is just heated, the reaction is physical. If there is burning in the process, than the state of the copper will change, making it a chemical reaction.
The vinegar-baking soda reaction is a chemical change.
no rusting iron is not a physical change it is a chemical change
what is the main chemical for making fabric conditioner, the gel type one
It is a physical change because the reaction can easily be reversed and no heat is involved.
Yes, it is a chemical reaction.
no don't be silly. it is a physical change because you are able to change it back to its original state. :)