In order to calculate the heat of fusion for a piece of ice placed in warm water, you must know:

W) The energy released by the warm water and the mass of the water

X) The energy released by the warm water and the mass of the ice

Y) The energy released by the ice and the mass of the warm water

Z) The energy released by the ice and the mass of ice
X) THE ENERGY RELEASED BY THE WARM WATER AND THE MASS OF THE ICE