Question

What happens inside water molecules if heat is added when water boils?

• A. The energy is stored in the form of potential energy; therefore, the temperature doesn't increase
• B. The energy is added as kinetic energy; therefore, the molecules move faster
• C. The energy is stored as potential energy; therefore, the molecules move faster
• D. The energy is added as kinetic energy; therefore, the temperature increases
• E. All options are correct

Answer 1

The correct option is A The energy is stored in the form of potential energy; therefore, the temperature doesn't increase

Water boils at 100${}^{\circ }C$. If we add more heat to boiling water, then it is used to convert to vapour and its potential energy increases. But the temperature doesn,t increase above 100${}^{\circ }C$.