A calorimeter contains 23.0 of water at 11.5. When 1.40 of (a substance with a molar mass of 62.0 ) is added, it dissolves via the reaction and the temperature of the solution increases to 30.0.
Calculate the enthalpy change, , for this reaction per mole of .
Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 and 1.00 ] and that no heat is lost to the calorimeter itself, nor to the surroundings.