The experimental enthalpy of decomposition of H2O2 was determined using another coffee-cup calorimetry. A sample of H2O2 solution was placed in the calorimeter and the initial temperature of H2O2 solution and the calorimeter was measured. Then, KI solution was added to the solution to catalyze the decomposition of H2O2 to H2O. This resulted to an increase of 16.5ºC in the temperature. Determine the experimental enthalpy of decomposition per mole of H2O2 given the following additional information. Express your answer in kJ/mol and in 2 decimal places.

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The experimental enthalpy of decomposition of H2O2 was determined using another coffee-cup calorimetry. A sample of H2O2 solution was placed in the calorimeter and the initial temperature of H2O2 solution and the calorimeter was measured. Then, KI solution was added to the solution to catalyze the decomposition of H2O2 to H2O. This resulted to an increase of 16.5ºC in the temperature. Determine the experimental enthalpy of decomposition per mole of H2O2 given the following additional information. Express your answer in kJ/mol and in 2 decimal places.

moles H2O2:  0.018 mol

Ccal: 53.82 J/oC

mass of the solution (mainly water): 35.2 g

Cp of water: 4.184 J/goC

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