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Consider the reaction NH4Cl(aq) → NH3(g) + HCl(aq) The standard free energy change for this reaction is 62.8 kJ. The free energy change when 1.99 moles of NH4Cl(aq) react at standard conditions is _______ kJ. What is the maximum amount of useful work that the reaction of 1.99 moles of NH4Cl(aq) is capable of producing in the surroundings under standard conditions? If no work can be done, enter none.