Question

What is the physical state of water at :

(a) 250°C

(b) l00° C

Answer 1

• The boiling point temperature of the water is l00° C. Above this temperature (250° C), water exists in the gaseous state i.e., as vapors 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 vapors are present but at 250°C we have only vapors or steam and no liquid.