Define the melting point and boiling point.

Define condensation and sublimation.

Why temperature remains constant during melting and boiling?

Define latent heat of fusion. Give its value for ice.

Why is ice at $0°\mathrm{C}$ more effective in cooling than the same quantity of water at $0°\mathrm{C}$?

Define latent heat of vaporisation. Give its value for water.

Why is steam at $100°\mathrm{C}$ a more effective heating agent than water at $100°\mathrm{C}$?

Define evaporation. Give an example that indicates that evaporation is an endothermic process.

What are the factors which affect the rate of evaporation?