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10 June, 06:46

When an automobile engine starts, the metal parts immediately begin to absorb heat released during the combustion of gasoline. How much heat will be absorbed by a 165 kg iron engine block as the temperature rises from 15.7°C to 95.7°C? (The specific heat of iron is 0.489 J/g·°C.)

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  1. 10 June, 08:14
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    H = 4,034,250 J

    Explanation:

    Mass, m = 165kg = 165,000g (Converting to grams)

    Initial temperature = 15.7°C

    Final temperature = 95.7°C

    Temperature change, ΔT = 95.7 - 15.7 = 50°C

    Specific heat capacity, c = 0.489 J/g·°C

    Heat = ?

    All the parameters are related with the equation below;

    H = m * c * ΔT

    H = 165000 * 0.489 * 50

    H = 4,034,250 J
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