3. How much heat will be required to melt 1000 g. of ice and warm the water to 20°C.?
4. How many grams of ice at 0°C. can be melted by 400 g. of water at 55°C.?
5. What are two advantages of the high specific heat of water? Two disadvantages?
6. If the specific heat of iron is 0.1125, how much ice at 0°C. can be melted by a 200-g. ball of iron heated to 300°C?
7. What is the temperature of a hot ball of iron weighing 80 g., if when placed on a piece of ice at 0°C. it melts 90 g. of ice?
8. If 500 g. of copper at 400°C. are placed into 3000 g. of water at 10°C. what will be the resulting temperature?
9. What weight of water at 90°C. will just melt 10 kg. of ice at 0°C.?
10. If the smooth dry surface of two pieces of ice are pressed together for a short time the two pieces will be frozen into one piece. Explain.
11. Tubs of hot water are sometimes placed in vegetable cellars to prevent the vegetables from freezing. Explain.
12. How many B.t.u. are given out when 2 lbs. of water freeze?