Experiment for Measuring the Heat of Fusion and Vaporization of Water
Converting Ice (Solid) into Water liquid - Measuring Heat of Fusion
Equipment needed:
Beaker with ice shavings
Bunsen Burner
Thermometer
Stopwatch
Stand
Method:
Take a container with small pieces of ice in it and place it on a stand.
Suspend a thermometer in the container to measure the temperature.
Take a stop watch to measure accurate time at different stages.
Now place the container on the burner.
Record the temperature at regular time intervals.
Observation:
The ice will start melting after absorbing heat. The temperature will remain same up to until all the ice melts.
Note the time and , which the ice takes to melt completely into water at . Supply heat continuously to water at , again note the time, its temperature will start to increase.
Note the time, which the water in the container takes to reach its boiling point at from
Draw a temperature-time graph as shown in graph.
Calculate the heat of fusion of ice from the data using the graph.
Converting Water (Liquid) into steam (Gas) - Measuring Heat of Vaporization
This is a continuation of the previous experiment.
Method:
The container now contains boiling water.
Continue to supply heat to water, till all the water convert into steam.
Note the time during which water in container completely changed into steam at its boiling point.
Plot a graph using the values and use it to calculate the heat of vaporization of water