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When 1.00L of 1.00 M Ba(NO3)2 solution at 25.0°C is mixed with 1.00L of 1.00 M Na2SO4 solution at 25.0°C in a calorimeter, the white solid BaSO4 forms and the temperature of the mixture increases to 28.1°C. Assuming that the calorimeter absorbs only a negligible quantity of heat and that the density of the final solution is 1.0 g/mL, calculate the enthalpy change per mole of BaSO4 formed.

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