1. If 2600 J of energy are expended to rub two ice blocks against each other and the specific latent heat of ice is 325 J/g, then the mass of the melted ice is   8 g   16 g   24 g   32 g   Hint Half-n-half Clue   2. The heat gained or lost by a body during a change of state is the product of its _______ and the specific latent heat.   Mass   Volume   Weight   Half-n-half Clue   3. In an experiment, a thin copper wire with weights at either end is placed on a supported block of ice. The thin wire is observed to pass through the ice. The experiment shows that an increase in _______.   specific latent heat causes the freezing point of water to rise above 0o   pressure causes the freezing point of water to drop below 0o   specific latent heat causes the freezing point of water to drop below 0o   pressure causes the freezing point of water to rise above 0o   Half-n-half Clue   4. When the cooling curve for naphthalene is plotted on a graph of temperature (in oC) vs. time (in minutes), the following three regions are observed: in the first 2 minutes, the temperature drops from 90oC to 80oC; in the next 6 minutes, the temperature remains constant at 80oC; and in the last 4 minutes, the temperature falls from 80oC to 60oC. The naphthalene is a mixture of liquid and solid in the time interval from _______.   8 to 12 minutes   0 to 2 minutes   2 to 8 minutes   Half-n-half Clue   5. Burns are more injurious when caused by steam than when caused by boiling water.   True   False   6. Latent heat = _______ × Specific latent heat.   Mass   Weight   Volume   Half-n-half Clue   7. If 2640 J of heat are released on changing 8 g of water at 0oC to ice at 0oC, the specific latent heat of fusion for water is   0.33 J/g   0.66 J/g   330 J/g   660 J/g   Half-n-half Clue