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20 October, 12:25

A 1.0 g sample of food reacts with oxygen in a calorimeter containing 500 g of water. The temperature rises 10°C. What is the energy content of the food?

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  1. 20 October, 12:52
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    The rule that we will use to solve this problem is:

    heat = specific heat x mass x ΔT

    where:

    specific heat of water = 1.0 cal / g C

    mass = 500 grams

    ΔT = 10 degrees celcius

    Substitute to get the heat as follows:

    heat = 1 * 500 * 10 = 5000 calories

    Therefore, the energy content in food is equal to 5000 cal/gram which is equivalent to 5 Cal/gram
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