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17 September, 07:32

2. How much heat is released when 432g of water cools down from 710C to 180C?

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  1. 17 September, 10:13
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    The heat released by the water when it cools down by a temperature difference AT

    is Q = mC, AT

    where

    m=432 g is the mass of the water

    C, = 4.18J/gºC

    is the specific heat capacity of water

    AT = 71°C - 18°C = 530

    is the decrease of temperature of the water

    Plugging the numbers into the equation, we find

    Q = (4329) (4.18J/9°C) (53°C) = 9.57. 104J

    and this is the amount of heat released by the water.
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