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An electrochemical battery is used to provide 1 milliwatt (mW) of power for a (small) light....

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Chemistry

An electrochemical battery is used to provide 1 milliwatt (mW)of power for a (small) light. The chemical reaction in the batteryis: 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, 1bar. 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
4.5 Ratings (889 Votes)
N2 g 3H2 g 2NH3 g H 2HfNH3 g HfN2 g 3HfH2 g 24611 10 30 9222 kJ H 9222 kJmol of N2 that reacts S 2SfNH3 g SfN2 g 3SfH2 g 219234 1915 313059 19859 JK S    See Answer
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