Water boils. Is this a chemical or physical change?

1 Answer
Sep 30, 2016


This is a physical change, as indeed are all changes of state.


Most would agree that changes of state are a physical change: solid to liquid; liquid to gas; condensation etc. Here, we make a transition from the liquid state to the gaseous state:

#H_2O(l) rarrH_2O(g)#

No chemical bonds have been broken, and no new substances have been formed. The transition is an example of physical change.