Heat Objective 6 PRACTICE SET: Change of State III 1. Examine the graph below, and identify and describe the process that is occuring in each lettered region. Change of State A. 126 Temperature 100 .. . ... D B. 80 60 4E C. B -20 A. ..A.. - 4 0 / D. 8:00 0:10 0: 20 0:30 0:40 0:50 1:00 Time 2. What is the melting point of this substance? What is the boiling point of this substance? 3. Describe what happens to the molecules of a substance as it is heated from the solid state to the gaseous state. Include information about the molecules kinetic energy. HEAT - 19