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27 September, 00:06

The specific heat of carbon is 0.71 j / (g C) how much energy is given off as a 2 gram piece of graphite cools from 120 to 20 C

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  1. 27 September, 00:35
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    -142 joules (or - 100 joules when accounting for significant figures)

    Explanation:

    q = m c delta T

    q = (.71) (2) (20 - 120)

    q = (.71) (2) (-100)

    q = - 142 joules
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