8. *A 2-kg block of copper is heated to 400 C and dropped into an insulated bucket that contains a mixture of ice and water at 0 C. The final temperature of the copper is 0 C. How much ice melted in the process? 9. *The total internal kinetic energy of 5 gallons of water is 2 x 108 J. The total internal kinetic energy of the water in a 100,000-gallon swimming pool is 5 x 10 J. (1 Gallon = 0.003785 m. Density of the water = 1000 kg/m. The atomic mass of water is 18 u.) a. How many water molecules are in the 5-gallon water? b. Which body of water is at higher temperature? Explain your answer.