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27 May, 10:22

The nutritional information on a cereal box shows that one serving of a dry cereal has 200 kilocalories. If a person were to ignite one serving of the cereal in a bowl, the amount of heat given off would be sufficient to raise the temperature of 20 kg of water how many degrees Celsius

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  1. 27 May, 10:51
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    10°C.

    Explanation:

    Heat released in any system can be calculated as follows:

    Heat released = m c DT

    Here, m is the mass, c is the specific heat and DT is the change in temperature.

    Heat released = 200 kcalories = 200,000 calories

    The mass of water = 20 kg = 20000 g

    The specific heat of water = 1 cal / g degree

    The rise in the temperature is as follows:

    heat released = m c DT

    200,000 = 20,000 (1) (DT)

    DT = 10°C.

    Thus, the answer is 10°C.
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