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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 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, 1bar? 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 canoperate at 25o C

Answer & Explanation Solved by verified expert
3.7 Ratings (698 Votes)
G Gproducts GreactantsG fG NH3 1 2 f G N2 3 2 f G H2 1648 12 x 0 32 x0 1648 kJ molfree energy energy 1648kJmolpart BIf we assume    See Answer
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