1. Heating and cooling cure of water
GRADE 10
PHYSICAL SCIENCES
CHEMISTRY

2. Heating and cooling of water
Aim
To investigate the heating and cooling curve of water.
Apparatus
beakers
ice
Bunsen burner
thermometer
water
Stop watch

3. Name the apparatus in the diagram

4. Method Place some ice in a beaker.
Measure the temperature of the ice and record it.
After 1 minute measure the temperature again and record it. Repeat every minute, until at least 3 minutes after the ice has melted.
Plot a graph of time versus temperature for the heating of ice.
Heat some water in a beaker until it boils. Measure and record the temperature of the water.
Remove the water from the heat and measure the

5. temperature every 1 minute, until the beaker is cool to touch.
Show the results in a graph of time versus temperature
Warning Be careful when handling the beaker of hot water. Do not touch the beaker with your hands, you will burn yourself.

6. Record your results in the following table

7. Results for heating curve
Draw a graph to indicate the heating and cooling of water

8. Results for cooling curve

9. Conclusion
A heating curve of a substance gives the changes in temperature as we move from a solid to a liquid to a gas. A cooling curve gives the changes in temperature as we move from gas to liquid to solid.