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23 June, 10:03

The complete combustion of 0.721 g of a snack bar in a calorimeter (Ccal = 6.15 kJ/°C) raises the temperature of the calorimeter by 1.37 °C. Calculate the food value (in Cal/g) for the snack bar.

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  1. 23 June, 11:29
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    The food value of the snack bar could be calculated by

    Food Value = CcalΔT/m

    So, the food value for the snackbar would be

    Food value = (6.15 kJ/°C) (1.37°C) / 0.721 g = 11.68 kJ/g

    Convert kJ to cal (1 kJ = 239 cal)

    Food value = 11.68*239 = 2791.52 cal/g
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