1. Snow is formed due to a change of state from liquid to solid.   True   False   2. The heat gained or lost by a body during a change of state is the product of its _______ and the specific latent heat.   Weight   Volume   Mass   Hint Half-n-half Clue   3. An increase in pressure results in an increase in the freezing point of a substance.   True   False   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 liquid in the time interval from _______.   0 to 2 minutes   2 to 8 minutes   8 to 12 minutes   Half-n-half Clue   5. Water vapor is invisible.   True   False   6. If 2970 J of heat are released on changing 9 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   7. Hail is formed due to a change of state from vapour to solid.   True   False