Volume of water and cooling.

The speed or rate at which water cools depends on a number of variables which can easily be investigated. The method below can be used to investigate how the volume of water, affects its cooling rate.

Experiment 3 Volume of Water

Equipment

  • Measuring cylinder
  • Thermometer
  • 250ml beaker
  • Stopwatch
  • Kettle

Method

  1. Boil the kettle.
  2. Put 50ml of hot water into the beaker.
  3. Using the thermometer measure the temperature every 30 seconds for 5 minutes.
  4. Repeat this with 100ml, 150ml, 200ml and 250ml of hot water.

Risk Assessment

Boiling water can scald. Care must be taken when pouring the water into the measuring cylinder. The measuring cylinder will also become very hot so take care when pouring the hot water into the beaker. Do not sit at the work bench, if hot water is spilled it may go into your lap. Spilled water can also cause a slipping hazard, to prevent this clean up spillages promptly.

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