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March 27, 2017

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A 1.800 g sample of octane, C8H18, was burned in a bomb calorimeter whose total heat capacity is 11.66 kJ/°C. The temperature of the calorimeter plus contents increased from 21.12°C to 29.85°C.
What is the heat of combustion per gram of octane?
What is the heat of combustion per mole of octane?

  • chemistry - ,

    heat released = q = Ccal*delta T = 11.66 x (Tfinal-Tinitial) in kJ.
    q/1.800 = heat/gram in kJ/gram
    (q/1.800) x molar mass Octane = delta H/mol in kJ/mol

  • chemistry - ,

    0.495

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