UNIT 2: SUBSTANCES xercise 21
If 30 mL of water weighs 30 g, and the same volume of mercury weighs 408 g.
calculate the densities of water and mercury.
Is tasting an advisable method for identifying substances? Why?
What is the difference between ice, liquid water and steam?
Do you think plastic and rubber conduct electricity?
al Pronerties

How to convert a density of 0.791g/cm3 to lb/ft3

Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat

Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.