How much heat is produced when 0.200 mole of H₂(g) reacts with 0.300 mole of Cl₂(g) if the enthalpy of reaction for the production of one mole of HCl(g) is -92.3 kJ/mol_rxn?

Question

Quizplus · Accepted Answer

The reaction is H2 + Cl2 → 2HCl. The limiting reactant is H2, which produces 0.200 mole of HCl. Since the enthalpy change is -92.3 kJ for 2 moles of HCl, for 0.200 mole, the heat produced is 0.200 * (-92.3/2) = -9.23 kJ. However, since the reaction produces 2 moles of HCl per mole of H2, the correct calculation is 0.200 * (-92.3) = -18.46 kJ, which is approximately 36.9 kJ when considering the stoichiometry correctly.

How Much Heat Is Produced When 0