Which of the following properties must be known in order to calculate the amount of heat needed to melt 1.0 kg of ice at 0ºC?

I. The specific heat of water

II. The latent heat of fusion for water

III. The density of water

Verified Answer :

AL2006

If you're only melting ice ... turning solid ice at 0°C into liquid water at 0°C ...
then you only need to know the latent heat of fusion for water. 

That's exactly what it means ... the amount of energy involved when a gram
of H₂O changes in either direction between liquid and solid, with no change
in temperature.