The idea of a “mole” is often hard to wrap your brain around. to you conceptualize how large a mole actually is, calculate how many times a mole of pennies would go around the earth if they were placed flat on the ground end to end. (to do this calculation you will need to find the diameter of a penny and the circumference of the earth)

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