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March 25, 2017

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a 0.0500 mol sample of a nutrient substance is burned in a bomb calorimeter containing 2.00 x 10^2g H2O. If the formula weight of this nutrient substance is 114g/mol, what is the fuel value (in nutrient Cal) if the temperature of the water increased 5.70C

  • chemistry - ,

    mols sample = 0.05/114 = approx (but you do it for the real number) = 0.00044
    q = mass H2O x specific heat H2O x delta T.
    q = 200g x 1 cal/g*C x 5.7
    q = approx 1100 calories for 0.05g or
    1100/0.05 = approx 23000 calories
    23,000 calories x (1 kcal/1000 cal) = 23 kcal = 23 nutrient calories.

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