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5. A 755 g piece of copper is heated in a furnace to a temperature 7. The copper is then inserted into a 145 g copper calorimeter containing 260 g of water. The initial temperature of the water and calorimeter is 17 .C, and the final temperature after equilibrium is established is 40 C. When the calorimeter and its contents are weighed, 39.0 g of water are found to have evaporated. What was the temperature T?(cw 4186 J/(kg. C), Lf=3.35 x 10% j/kg, Ly=2.26 x 100 J/kg, Ccopper = 387 J/(kg. C) .C 6. A well-insulated styrofoam bucket contains 149 g of ice at 0 .C. If 21 g of steam at 100 .C is injected into the bucket, what is the final equilibrium temperature of the system?(Cwater=4186 J/kg. C, LF= 3.35 x 10' J/kg, Ly=2.26 x 10' J/kg) .C 7. A cube of ice is taken from the freezer at -14 .C and placed in a 100 g aluminum calorimeter filled with 270 g of water at a temperature of 26 C. The final situation is observed to be all water at 17 .C. What was the mass of the ice cube?(Cwater=4186 J/kg.C, Cal-900 J/kg.C, Cice=2000 J/kg. C, LF=3.35 x 10 3/kg) grams 8. An electric immersion heater has a power rating of 1900 W. If the heater is placed in a 1.3 kg of water at 15 .C, how many minutes will it take to bring the water to a boiling temperature? (Assume that there is no heat loss except to the water itself. Cwater=4186 J/kg.C) min 9. A 44.0-kg block of ice at 0C is sliding on a horizontal surface. The initial speed of the ice is 7.30 m/s and the final speed is 3.20 m/s. Assume that the part of the block that melts has a very small mass and that all the heat generated by kinetic friction goes into the block of ice. Determine the mass of ice that melts into water at 0.C. grams 10. A 0.500-kg of ice is initially at temperature of -8.0 C. How much heat is required to melt one-third the mass of the ice only