1. Frost is formed due to a change of state from vapor to solid.   True   False   2. Hail is formed due to a change of state from vapour to solid.   True   False   3. If the specific latent heat of vaporization for water is 2.25 kJ/g, then the amount of heat required to vaporize 28 g of boiling water to steam at 100oC is   63 J   630 J   6300 J   63000 J   Hint 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 _______.   pressure causes the freezing point of water to drop below 0o   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   Half-n-half Clue   5. The freezing point of salt water is less than 0oC.   True   False   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 _______.   vaporization   fusion   fission   Half-n-half Clue   7. The boiling point of salt water is less than 100oC.   True   False