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7 March, 12:49

How much heat is lost when a 692 g piece of aluminum cool from 176°C to 85°C? The specific heat of aluminum is 0.125 cal/g°C.

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  1. 7 March, 16:29
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    Heat loss is - 7871.5J

    Explanation:

    Mass = 692g

    Initial temperature (T1) = 176°C

    Final temperature (T2) = 85°C

    Specific heat capacity of Al = 0.125J/g°C

    Heat energy = ?

    Q = mc∇t

    Q = heat energy

    M = mass of substance

    C = specific heat capacity of substance

    ∇t = change in temperature of substance = T2 - T1

    Q = mc∇t

    Q = 692 * 0.125 * (85 - 176)

    Q = 86.5 * - 91

    Q = - 7871.5J

    The heat loss is - 7871.5J or - 7.87kJ
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