A calorimetry experiment was performed to determine the heat of fusion of ice. After shaking off any excess water, several ice cubes were added to 99 g of warm water contained in a calorimeter. The initial temperature of the warm water was 46.8°C. The ice-water mixture was stirred until the temperature reached a stable, minimum value, which was 1.1°C. Any unmelted ice remaining at this point was immediately and carefully removed using tongs and the mass of the water in the calorimeter was measured = 154 g. Required:
a. Calculate the amount of heat in joules released by the warm water as it cooled.
b. What amount of heat was absorbed by the ice as it melted?
c. Determine the amount of energy absorbed per gram of ice as it melted.
d. Calculate the heat of fusion (the heat required to melt the ice) in kilojoules per mole. The accepted value for the heat of fusion of ice is 6.02 kJ/mole.
e. What is the percent error for the experimentally determined heat of fusion?
f. When a mixture of ice and water originally at 0°C is heated, the temperature remains constant until all the ice melts.
g. Explain what is happening to the heat energy absorbed during this time when the temperature does not change.