Calculate the enthalpy change per mole of BaSO4 in kilojoules per mole.?

18.5g of BaSO4(s) dissolves in 600.0ml of water in a coffee cup calorimter. The temperature of the water rose from 24.5oC to 27.9oC. Calculate the enthalpy change per mole of BaSO4 in kilojoules per mole. ume that the specific heat capacity of the solution is that of water and that no heat is absorbed by the calorimeter.