Question

why is ice at 273 K more effective in cooling than water at the same temerature​

Answer 1

Answer:

because when ice melt or change its form. it takes energy from surrounding or use latent heat leaving coolness.

but the water on same temp does not has latent heat so it does not effect much.

Answer 2

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Ice at 273K is more effective in cooling than water at the same temperature as cie takes latent heat from the substances for melting and hence cools the substances more effectively than water at the same temperature.