... beaker of water. Heat balances were calculated as they indicate the theoretical amount of heat (Qw) required to raise the temperature of the water in the beaker to its final temperature, this would be subtracted from the electrical energy input from the coil heater to give the heat loss. Method Note: Do not operate the heating coil in air. A 5 litre beaker was filled with approximately 4 litres of cold tap water. Then a heating coil rated at 400W/230V was placed above it. The heating coil apparatus contained 3 slots within its base in which 3 thermometers were placed. Thermometer 1 was placed 7cm below water level, thermometer 2, 10cm and thermometer 3 was 17cm respectively. The position of the thermometers and the coil below point of volume of water were also observed which in turn gave the weight (Kg). The temperatures of the 3 distances were measured at 1 minute intervals ...

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