A calorimeter contains 34.0 mL of water at 13.5, ^{circ}C. When 1.80 g of rm X (a substance with a molar mass of 70.0 g/mol) is added, it dissolves via the reaction
rm X{(s)}+H_2O{(l)} rightarrow X{(aq)}
and the temperature of the solution increases to 25.0, ^{circ}C.
Calculate the enthalpy change, Delta H