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20 January, 13:56

a piece of food is burned in a calorimeter that contains 200.0g of water. If the temperature of the water rose from 65.0°C to 83.0°C, how much heat energy in joules was contained in the food? Specific heat if water is 4.184 j/g°C.

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  1. 20 January, 14:57
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    Answer: 15062.4 Joules

    Explanation:

    The quantity of heat energy (Q) required to heat a substance depends on its Mass (M), specific heat capacity (C) and change in temperature (Φ)

    Thus, Q = MCΦ

    Since,

    Q = ?

    Mass of food = 200.0g

    C = 4.184 j/g°C

    Φ = (Final temperature - Initial temperature)

    = 83.0°C - 65.0°C = 18°C

    Then, Q = MCΦ

    Q = 200.0g x 4.184 j/g°C x 18°C

    Q = 15062.4 J

    Thus, 15062.4 joules of heat energy was contained in the food.
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