Using the data from yesterday's lab which involved the measurement of the temperature change as ice melted into a liquid and then heated to boiling with the production of a vapor, a line graph showing time v temperature was constructed. Questions regarding the melting/freezing point, the boiling point vaporization were answered from the graph.The effect which air pressure has on boiling was explained using diagrams so that the demonstration of boiling water by placing a previously boiled flask of water under cold running water could be explained. The questions presented in the text from this chapter were answered at the conclusion.