Its a chemical reaction :]
Because it just is. Because no chemical reaction takes place when water boils. It simply changes physical form from liquid to gas.
no it is the molecules in the water moving fast and bumping into each other
Physical.
it is chemical
It is a physical change.
Physical, steam is still H2O.
Boiling of ethyl alcohol at 79 degrees Celsius is a physical change. It is a reversible process where the alcohol changes from liquid to vapor state without undergoing a chemical reaction.
Because you are not changing the composition of the substance, boils is a physical property.
physical
Kettle
Yes, when water boils inside a kettle, steam is formed and it comes out of the spout.
Boiling is a physical phenomenon, a change of phase.