4C20.51 heat of fusion of ice H-54 Melt some ice in a calorimeter with a known amount of water. Tin is heated to 360 C and temperature readings taken every 30 seconds until the temperature reaches 160 C. Half the time the temperature remains at 230 C. 4C20.54 heat of fusion of water 26-5.1 Place a thermocouple cooled in liquid nitrogen in warm water. Plot temperature as ice forms and then melts. A manometer shows cooling when hypo or ammonium chloride are added to water, heating when sulfuric acid is used. ALSO - equal weights of water and ammonium nitrate will lead to freezing.
Heat is generated if sulfuric acid is dissolved in water.
Cooling results if hypo or ammonium nitrate is dissolved. 4C20.59 latent heat heating 26-5.3 Two experiments that use the latent heat from one substance freezing to heat another. H-48 Prepare a supersaturated solution of sodium acetate or sodium sulfate and drop in a crystal to trigger crystallization. A thermocouple will show the change in temperature. A manometer hooked into the jacket of a double walled flask is used to detect the change in temperature of a sodium thiosulfate solution as it crystallizes.