When 5.00 g of sodium hydrogen carbonate, NaHCO3(s), reacts completely with 70.00 mL of acetic acid, CH3COOH(aq), the temperature increases from 15.5 C to 22.3C. Assume that the acid solution has the same density and specific heat capacity as water and that the mass of the final solution is 70.00 g. Calculate the molar enthalpy of the reaction, Hr of NaHCO3.