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chemistry 106

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A 0.1589 g sample of solid magnesium is burned in a bomb calorimeter that has a heat capacity of 1769 J/°C. The calorimeter contains exactly 251 g of water, and the temperature increases by 1.126°C. Calculate the heat given off by the burning Mg, in kJ/g and in kJ/mol.

  • chemistry 106 -

    q = [mass water x specific heat water x delta T] + [calorimeter constant x delta T]
    This give you q.
    Then q/0.1589 g gives J/g. Convert that to kJ/g and to kJ/mol.

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