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Recovery rate is the amount of water that is heated to a set temperature, per hour. An draw efficiency and gallon capacity of the water heater may be used to calculate the length of the showering period in minutes. Characterized for its maximum hot water use to calculate the peak hot water demand.
Use the data in your data table to calculate the heat energy captured by the water for each trial and record your result in the column labeled Qwater. 1  The energy you just calculated (Qwater) reflects energy released by the total amount of food burned, or (Mf-Mi) grams of food burned.ow, let us see how to calculate the energy stored in the water for a measured increase in the temperature (in Â°C). The temperature difference times the mass of the water (in grams) will give you the amount of energy captured by the calorimeter, in calories, a unit of chemical energy.