URGENT 9a. In the balanced reaction below, when 26.8g of Zn are able to completely react, 62.8 kJ of heat are produced. Determine the enthalpy change per mole of Zn. Zn (s) + 2HCI (aq) arrow ZnCI (aq) + H2 (g) 9b. Which of the reactants will be used up first? 9c. When the limiting reactant is used up, it's recorded that 595.57 kJ of heat are produced. According to the balanced equation above, what is the enthalpy change of this reaction?