What is the physical state of water at: a. `250^(@)C b. `100^(@)C ?

Explanation

Boiling point temperature of water is `100^(@)C`. Above this temperature `(250^(@)C)`, water exists in the gaseous state i.e., as vapours or as steam. However, at `100^(@)C`, both liquid and gaseous states are present. Actually, at the boiling point temperature, both the liquid and gaseous states of a substance co-exist. These are in a state of equilibrium. We may conclude that at `100^(@)C`, both liquid water and vapours are present but at `250^(@)C` we have only vapours or steam and no liquid.