If 500mL of 1M Ba(NO3)2 (aq) solution at temperature of 25C is mixed with 500mL of 1M Na2SO4 (aq) solution at 25C in a “coffee cup” calorimeter, the…

If 500mL of 1M Ba(NO3)2 (aq) solution at temperature of 25C is mixed with 500mL of 1M Na2SO4 (aq) solution at 25C in a “coffee cup” calorimeter, the temperature of the mixture rises to 28.1C and the white precipitate BaSO4 forms according to the net ionic reaction:

Ba (aq) + SO4 (aq) –> BaSO4 (s)

Calculate enthalpy change for this reaction per mole of BaSO4 formed. Assume no heat is lost to calorimeter and both the specific heat and density of this mixture is the same as that of water.