20. Heat and Temperature

What is the mass of the ice cube initially taken from the freezer, given that the final temperature of the system is 17.0 °C?

What mass of steam at 100°C must be added to 1.90 kg of ice at 0°C to yield liquid water at 16°C? The heat of fusion for water is 333 kJ/kg, the specific heat is 4186 J/kg°C, and the heat of vaporization is 2260 kJ/kg.