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Chapter 3, problem 21. An electrochemical battery is used to provide 1 milliwatt (mW) of power...

Chapter 3, problem 21. An electrochemical battery is used to provide 1 milliwatt (mW) of power for a (small) light. The chemical reaction in the battery is: 1/2 N2 (g) + 3/2 H2 (g) → NH3 (g) a. What is the free-energy change for the reaction at 25o C, 1 bar? b. Calculate the free-energy change for the reaction at 50o C, 1 bar. State any assumptions made for this calculation. c. The limiting reactant in the battery is 100 g of H2. Calculate the maximum length of time (seconds) the light can operate at 25o C.

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