Question

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

Answer 1

Latent heat of fusion:-

• The amount of heat required to convert one state of matter to the other without changing the temperature is known as latent heat.
• The heat which is required to convert a substance in the solid phase to liquid keeping temperature and pressure constant is known as the latent heat of fusion.
• Thus, the ice at $273\mathrm{K}$ will absorb more heat than water from the substance in order to overcome the latent heat of fusion.
• Therefore, this helps in the more effective cooling effect at $273\mathrm{K}$.
• On the other water however does not absorb any heat from the substance