question_answer 10)

What is the physical state of water at : (a) 250°C             (b) 100°C?  

Answer:

(a): Physical state of water at 250°C is gaseous state because the boiling point of water is 100°C. Therefore at a temperature higher than its boiling point. It exists as gas.   (b): At 100°C both liquid and gaseous states are present. These are in a state of equilibrium. So at 100°C both liquid water and vapour are present.