A 550 G Solution at 27 $\degree$ C Is Produced by Mixing 0

A 550 g solution at 27.27 $\degree$ C is produced by mixing 0.800 mol hydrocyanic acid with 0.800 mol potassium hydroxide (40.00 g/mol) in water initially at 23.20 $\degree$ C.Calculate the molar enthalpy of neutralization of HCN with KOH.Assume that the heat capacity of the solution is 4.18 J/(g . $\degree$ C) .

A) 13.1 kJ/mol
B) (-5.85 kJ/mol)
C) 5.85 kJ/mol
D) (-11.7 kJ/mol)
E) 11.7 kJ/mol