Question

Why should bits of ice be wiped dry before adding them to the calorimeter during the determination of specific latent heat of fusion of ice?

Answer 1

If the ice is not dried there will be water at zero degrees celsius.

This water will contribute to the final mass of the liquid but will not gain the equivalent amount of heat the ice would gain.

The initial temperature of water in the calorimeter will not drop as much thus the resulting temperature will be too high.

This will result into an experimental value that is too low.

Answer 2

Here the energy is need to make great change water from the part of solid to liquid and also met ice in a fine manner.

in this  experiment you must try to measure the right latent heat of fusion of ice.

On the other hand energy needed to come from the part of cup of warm  water.