Question

Why is ice at 273K more effective in cooling than water at room temp?

Answer 1

Because when fusing ice gets a lot of heat, much more than water at 273 K,  especially if the water is at room temperature.
The heat of fuse of ice is about 333 kJ/kg and much more than heat of capacity of water (4.2 kJ/(kg °C).
The water evaporates even at room temperature, by getting at the same time a little heat, but vaporization at this temperature is less efficient than melting ice.

Answer 2

Answer:

Explanation:

ice at 273k ice  more effective in cooling than water at the same tempreture as ice takes latent heat from the substance for melting and hence cools the substance more effectively than water at the sam tem.