... piece of rope reaching from the bottom of inside the burner (where the alcohol would be) to a hole with a metal ring at the top of the burner. The metal ring can be taken off with the rope to refill the burner. We shall use these alcohol burners to heat up a metal beaker of 50ml of water by 40°C. We shall use a thermometer to measure this heat change. The flame of the alcohol burner must be blown out after the original temperature of the water has increased by 40°C. The metal beaker shall be held at the same distance above the alcohol burner each time by a clamp attached to a stand, and another clamp shall hold the thermometer in the water in the beaker. The alcohol burner shall be weighed before and after the experiment on electronic scales accurate to hundredths of grams. The difference in ...

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