How do you calculate enthalpy neutralization when you are given a situation where a coffee cup calorimeter, 50.0 ml of 1.00M NaOH and 50.0 ml of 1.00M HCl are mixed. Both the solutions were originally at 24.6?C. After the reaction, the final temperature is 31.3? C. Given that the density of NaCl solution is 1.038 g/ml and the specific heat of NaCl solution is 3.87 (J.g.?1.?C?1), The assumption is the that no heat is lost to the surroundings.