Final answer:
The standard enthalpy of reaction is calculated by using the heat produced during the reaction and converting it to kilojoules per mole by dividing by the number of moles of zinc reacted.
Step-by-step explanation:
The question is asking to calculate the standard enthalpy of reaction for the reaction of zinc with hydrochloric acid based on the heat produced when a sample reacts. To determine the enthalpy change per mole of zinc, we would convert the heat produced (ΔH) from kilojoules to kilojoules per mole using the molar mass of zinc. The procedure involves calculating the moles of zinc based on the mass and using the relationship ΔH = q/n, where 'q' is the heat exchanged observed during the reaction and 'n' is the number of moles of the reactant.
For instance, for a reaction where 1.34 g of Zn reacts with hydrochloric acid to produce 3.14 kJ of heat, the number of moles of Zn is calculated by dividing the mass of Zn by its molar mass (65.38 g/mol). Once the moles are calculated, we use ΔH = q/n to find the enthalpy change per mole of zinc reacting.