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

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Chemistry

Chapter 3, problem 21. An electrochemical battery is used toprovide 1 milliwatt (mW) of power for a (small) light. The chemicalreaction 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 limitingreactant in the battery is 100 g of H2. Calculate the maximumlength of time (seconds) the light can operate at 25o C.

Answer & Explanation Solved by verified expert
3.8 Ratings (485 Votes)
G Gproducts GreactantsG fGNH3 1 2 f G N2 3 2f G H2 1648 12 x 0 32 x0 1648 kJ molfree energy energy 1648 kJmolpart BIf we assume    See Answer
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