the goal:

Measuring the change in temperature of a mass of water during a combustion reaction.

Materials and tools:

Candle - Small metal box - Large open-ended metal box - Steel wool - Balance - Pen - Stirring rod - Thermometer

Steps:

1. Light the candle and weigh the large container.

2. Fill the container with water and weigh it again.

3. Secure the container on the candle.

4. Light the candle and heat the water.

5. Wait until the candle reaches the mark.

6. Measure the candle's mass and weigh the water again.

Note:

We can observe the change in water temperature.

Conclusion:

We can conclude that the number of calories released from the combustion of the candle is equal to the number of calories absorbed by the water.

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