Describe an experiment to determine the specific latent heat of fusion of ice. State 2 precautions necessary to obtain an accurate result
Experiment: Determining the specific latent heat of fusion of ice
Materials needed: Ice, thermometer, insulated container, heat source, stopwatch
Procedure:
1. Fill the insulated container with a known mass of ice.
2. Place the thermometer in the container to measure the initial temperature of the ice.
3. Apply heat to the ice until it completely melts. Use the stopwatch to measure the time it takes for the ice to melt.
4. Record the final temperature of the water after the ice has melted.
5. Calculate the specific latent heat of fusion of ice using the formula: Q = m * L, where Q is the heat absorbed by the ice, m is the mass of the ice, and L is the specific latent heat of fusion of ice.
Precautions:
1. Ensure that the insulated container is completely sealed to prevent any heat exchange with the surroundings, as this could affect the accuracy of the temperature measurements.
2. Use a calibrated thermometer to ensure accurate temperature readings. Any inaccuracies in temperature measurements could lead to errors in calculating the specific latent heat of fusion of ice.