1. The freezing point of salt water is less than 0oC.   True   False   2. When a body gains heat, there is always a rise in its temperature.   True   False   3. If 1625 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   5 g   10 g   15 g   20 g   Hint Half-n-half Clue   4. Snow is formed due to a change of state from liquid to solid.   True   False   5. 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 _______.   8 to 12 minutes   0 to 2 minutes   2 to 8 minutes   Half-n-half Clue   6. Fusion point and _______ occur at the same temperature.   boiling point   fusion point   solidification point   vaporizaton point   Half-n-half Clue   7. Vaporization point and _______ have the same numerical value.   fusion point   melting point   solidification point   liquefaction point   Half-n-half Clue