Because no chemical reaction is taking place. It is the same substance, just in a different state of matter.
A change in phase is a physical process.
A phase change is an example of a physical change, not a chemical, nuclear, or covalent change. During a phase change, the substance undergoes a change in state (solid, liquid, gas) without any change in its chemical composition.
Phase changes are physical changes in nature. They involve a change in the state of matter (solid, liquid, gas) rather than a change in the chemical composition of the substance. Heating or cooling a substance can trigger phase changes.
It is called a phase change.
physical change- the composition of the ethanol is not effected
Boiling is a physical change.
No, it's a phase change, which is physical.
It is a physical change. All phase changes are physical, not chemical. The chemical composition of water does not change when it changes from a liquid to a gas, or for that matter, to a solid.
Physical, as it remains water.
physical because a chemical change means it can never form back
Boiling is a physical phenomenon, a change of phase.
After a physical change the molecule remain intact.After a chemical change the molecule is modified.