A 24-g ice cube floats in 220 g of water in a 100-9 copper cup; all are at a temperature of 0C. A piece of lead at 86C is dropped into the cup, and the final equilibrium temperature is 12C. What is the mass of the lead? (The heat of fusion and specic heat of water are 3.33 x 105 J/kg and 4,186 J/kg - C, respectively. The specic heat of lead and copper are 128 and 387 J/kg - \"C, respectively.) 0729 x Relate the energy lost by cooling the lead to the total amount of energy needed to raise the temperature of every remaining part of the system and use the definition of the specific heat to relate that result to the temperature change and mass of the lead. kg Need Help? @