1.According to your results what is the boiling point of water? 2.How many minutes did it take for the ice to melt completely? 3.At what temperature did the water start to change to the gaseous phase? 4.Calculate the gradient of the graph for the following time intervals. 4.1 while ice was changing from liquid to gaseous phase. 4.2 while water was warming up from its melting point to its boiling point. 5.Write down the phase(s) of the water and the time interval(s) during which the average kinetic energy of the water molecules remained constant. 6.Use the kinetic theory of matter to explain why the average kinetic energy remained constant even though the water was continuously heated during this period. 7.Refer to the cooling curve to answer the following questions. 7.1 Write down the time interval during which the curve is the steepest 7.2 What is the phase of the water during this interval? 7.3 What does the shape of the curve tell us about the rate at which water cools down? 8.One of the precautions is that the thermometer should not touch the beaker. Give an explanation for this.
