Given, Mass of ice to be converted into steam

Temperature of ice
The heat required to convert ice at into the water at is given as:
Mass of ice Latent heat of fusion of ice
Latent heat of fusion of ice
Therefore,
Heat required to convert ice at into water at
Now, the water at has to be first heated to to be changed into steam.
The heat required to raise the temperature of water from to is given as:
Mass of water Increase in temperature Specific heat of water
Mass of water is the same as the mass of ice, which is equal to 1 g .
The increase in temperature of water
Specific heat of water
Putting all the required values, the heat required to raise the temperature of water

After this, further, some heat is required to be supplied to convert the water at to steam at the same temperature.
The heat required to convert water into steam Mass of water Latent heat of steam
Mass of water
The latent heat of steam is given as .
Therefore, the heat required

Now, the total heat required to convert ice to steam Heat required to convert ice into water + Heat required to raise the temperature to Heat required to convert water into steam

Therefore, the heat required to convert ice at into steam at is equal to 716 cal.