TANAGRAPH-1 When 100 mL of 1.0 M HCl was mixed with 100 mL of 1.0 M NaOH in an insulated beaker at constant pressure, a temperature increase of 5.7°C was measured for the beaker and its contents (Expt. 1). Because the enthalpy of neutralization of a strong acid with a strong base is a constant (-57.0 kJ mol). this experiment could be used to measure the calorimeter constant. In a second experiment (Expt. 2). 100 mL of 2.0 M acetic acid (Ka = 2.0 x 105) was mixed with 100 mL of 1.0 M NaOH (under identical conditions to Expt. 1) where a temperature rise of 5.6°C was measured. (Consider heat capacity of all solutions as 4.2 Jg'K' and density of all solutions as 1.0 g ml.) (2015) Enthalpy of dissociation (in kJ mol) of acetic acid obtained from the Expt. 2 is (B) 10.0 (A) 1.0 (D) 51.4 (C) 24.5