Question

When 1.0 L solution Ba (NO3) 2 2.0 M at 25oC is mixed with 1.0 L solution of 2.0 M Na2SO4 in a calorimeter, the reaction that occurs to produce solid barium sulfate and temperature of the mixture increased to 28.1 oC. Calculate the enthalpy change per mole for the reaction that occurs. Assume that the calorimeter does not absorb the heat generated, the heat capacity of the solution is 4:18 J oC-1 g-1 and the solution density of 1.0 g mL-1