Question

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

####Full explanation#####

Answer 1

ice at 273 K is more effective because it is at its melting point since there is no latent heat used...but the water which is in the melting prince and hence it has to be in the state of ice latent heat is used...

Answer 2

$\underline{\huge\mathfrak{Question:}}$

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

$\underline{\huge\mathfrak{Answer:}}$

We know that , the temperature of 273°Kelvin (K) is equal to 0°Celsius (C) and it is the melting point of ice at the same temperature . Another point to be kept in mind is that , the latent heat of melting of ice ( latent heat of fusion ) is $3.34\times 10^5$ joules per kilogram .

Now , ice at 273 K ( 0°C ) is more effective in cooling a substance than water at the same temperature of 273 K ( or 0°C ) because for melting , each kilogram of ice takes $3.34\times 10^5$ joules of its latent heat from the substance and hence , cools the substance more effectively . On the othet hand , water at the same temperature of 273 K ( or 0°C ) cannot take away any such heat from the substance and hence does not cool it more effectively .