Why is ice at 273 K more effective in cooling than water at the same temperature?

Answer : The heat energy  absorbed by ice to change to liquid state, without showing any rise in temperature is known as the latent heat. We already know, the  heat can change the physical state of a matter by overcoming the forces of attraction between the particles. For water freezing point and melting point is 0°C. So water has extra amount of hidden energy as compare to ice.

This is an answered question from Chapter 1. MATTER IN OUR SURROUNDINGS of CBSE Class 9th Science

Check for Complete Exercise Solution for Chapter 1. MATTER IN OUR SURROUNDINGS | CBSE Class 9th Science