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  • fooks
    Lv 7
    2 months ago

    Refer to: https://en.wikipedia.org/wiki/Glutaric_acid

    Molar mass of C₅H₈O₄ = 132.12 g/mol

    No. of moles of C₅H₈O₄ = (1.0930 g) / (132.12 g/mol) = 8.2728 × 10⁻³ mol

    Heat released in the reaction

    = (Heat absorbed by the water) + (Heat absorbed by the calorimeter)

    = [(1.361 × 10³) × 4.184 × (27.12 - 24.63)] + [858.7 × (27.12 - 24.63)] J

    = 16317 J

    = 16.317 kJ

    As heat is given off in the combustion, the heat of combustion is negative.

    The heat of combustion of C₅H₈O₄

    = -(16.317 kJ) / (8.2728 × 10⁻³ mol)

    = -1972 kJ/mol

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