A 50.0-ml sample of 0.90 M sodium hydroxide is quickly added to a calorimeter
containing 50.0 mL of 0.90 M hydrochloric acid at 20.1°C. The equilibrium temperature of the reaction mixture is 26.7 °C. The reaction mixture weighs 99.85 g.
HCl(aq) + NaOH(aq) → NaCl(aq) + H₂O
a. ΔT= ___ °C
b. If the specific heat of the reaction system is 3.93 J/g °C, calculate the heat of
reaction using the equation
ΔHrxn=-SHsystem x msystem x ΔT

c. Calculate the molar heat of reaction.