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At constant volume, the heat of combustion of a particular compound is –3680.0 kJ/mol. When 1.029...

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Chemistry

At constant volume, the heat of combustion of a particularcompound is –3680.0 kJ/mol. When 1.029 g of this compound (molarmass = 150.46 g/mol) was burned in a bomb calorimeter, thetemperature of the calorimeter (including its contents) rose by4.773 °C. What is the heat capacity (calorimeter constant) of thecalorimeter?

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4.4 Ratings (790 Votes)

energy released = -3680.0 kJ/mol

moles of this compound = mass / molar mass

                                       = 1.029 / 150.46

                                       = 6.84 x 10^-3

heat energy in kJ = 3680.0 kJ /mol x moles

                             = 3680 x 6.84 x 10^-3

                            = 25.17 kJ

heat capacity of calorimeter = heat energy / temperature rise

                                             = 25.17 / 4.77 °C.

                                             = 5.27 kJ/°C.

heat capacity of calorimeter   = 5.27 kJ/°C.
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