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5 March, 17:38

How much heat is given off when 869 g iron bar cools from 94 degrees celsius to 5

degrees celsius? * c of Fe is 0.444 J/g*celsius?

How much heat is given oft when 869 iron bar col from 94 degrees celsius to 5

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  1. 5 March, 18:08
    0
    Heat given off was - 34.34kJ

    Explanation:

    Mass of iron bar = 869g

    Initial temperature (T1) = 94°C

    Final temperature (T2) = 5°C

    Specific heat capacity of iron (c) = 0.444J/g°C

    Heat energy (Q) = Mc∇T

    Q = heat energy

    c = specific heat capacity

    ∇T = change in temperature

    M = mass of the substance

    Q = mc∇T

    ∇T = T2 - T1

    Q = Mc (T2 - T1)

    Q = 869 * 0.444 * (5 - 94)

    Q = 385.836 * - 89

    Q = - 34339.404J

    Q = - 34.34kJ

    The heat given of was - 34.34kJ
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