Heating curve of water the phase transitions of water analysis of a heating curve looking from left to right on the graph there are five distinct parts to the heating curve solid ice is heated and the temperature increases until the normal freezing melting point of zero degrees celsius is reached. To construct and interpret a heating curve for water materials 250 ml beaker 200 ml deionized water tap water will work reasonably well if deionized is not available ice hot plate with stirring capability teflon stir bar glass stir rod thermometer or other temperature measuring device ie thermoprobe or thermister. Cooling curve 1 fill one beaker about 2 3 full of warm tap water and place on the hot plate adjust the hot plate so that you can maintain the temperature of the water at about 75 oc for stearic acid or 60 oc for lauric acid 2 fill the other beaker about 2 3 full of water from the tap and set aside 3. The density of water and iced tea is 100 g ml over the range 0c 20c the specific heats of liquid water and ice are 4184 j goc and 2062 j goc respectively and the enthalpy of fusion of ice is 601 kj mol