Part 1: Citric Acid + Sodium Hydrogen Carbonate Thermochemistry Part 1: Citric Acid + Sodium Hydrogen Carbonate The strategy with this set of calculations is to determine the amount of heat transferred per one mole of the limiting reagent in the experiment. The limiting reagent in Part 1 is sodium hydrogen carbonate. To determine the amount of heat transferred in the reaction we use H=msT. Once this value has been calculated then the units are converted from Joules to kilojoules. Volume of citric acid solution Density of citric acid solution 1.02gmL1 Mass of citric acid (d=m/V) Specific heat capacity of citric acid solution Change in temperature for reaction H(msT) Mass NaHCO3(g) Moles NaHCO3(mol) mol H per mole of NaHCO3[H=molesNaHCO3H] Jmol1 H per 3 moles of NaHCO3 Jmol1 H per 3 moles of NaHCO3 in kJ/mol(1kJ=1000J) kJmol1 *Use the mass and molar mass of NaHCO3 **There are three moles of NaHCO3 in the balanced equation, so HpermolNaHCO3 is multiplied by 3 . H3C6H5O7(aq)+3NaHCO3(s)3CO2(g)+3H2O(l)+Na3C6H5O7(aq)