1. The fixed temperature at which a gas changes into its liquid state is called the _______.   liquefaction point   fusion point   vaporizaton point   solidification point   Hint Half-n-half Clue   2. With _______ in pressure, water boils above 100oC.   an increase   a decrease   3. Fusion point and _______ occur at the same temperature.   boiling point   vaporizaton point   fusion point   solidification point   Half-n-half Clue   4. 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 drop below 0o   specific latent heat causes the freezing point of water to rise above 0o   pressure causes the freezing point of water to rise above 0o   pressure causes the freezing point of water to drop below 0o   Half-n-half Clue   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 _______.   2 to 8 minutes   8 to 12 minutes   0 to 2 minutes   Half-n-half Clue   6. The amount of heat required to change a unit mass of a solid into a liquid, without changing its temperature, is referred to as the specific latent heat of _______.   fusion   fission   vaporization   Half-n-half Clue   7. The boiling point of salt water is less than 100oC.   True   False