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Calculate the time to raise the temperature of 150 litres of water from 20C to 60C in a household heating system? The hot water

Calculate the time to raise the temperature of 150 litres of water from 20C to 60C in a household heating system? The hot water tank is heated using a 3 kW electric resistance heater. 320 kJ of heat is lost to the surroundings during the heating process. The specific heat capacity of water is 4.1813 kJ/kg-K and the atmospheric pressure is 100 kPa.

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