i need help with the two following questions please.& thank you

1. How many grams of steam at 100 degrees Celsius must be added to 1.0kg of ice to melt it completely?


2.A revolutionary new diet advertises that one can lose weight simply by eating ice. When one eats ice,chemical energy in the body is used to melt the ice and then raise the temperature of the melted ice to the temperature of the body, 37 degrees Celsius.Past scientific studies have confirmed that the expenditure of 1.806 J of energy is necessary to metabolize 0.5kg of body fat.How many grams of ice at 0 degrees celsius would one have to eat to lose 0.5kg of body fat?