Suppose a hydrogen-oxygen fuel-cell generator was used to produce electricity fo

Question

Suppose a hydrogen-oxygen fuel-cell generator was used to produce electricity for a house. Use the balanced redox reactions and the standard cell potential to predict the volume of hydrogen gas (at STP) required each month to generate the electricity needed for a typical house. Assume the home uses 1100kWh of electricity per month. Express your answer using two significant figures. Suppose a hydrogen-oxygen fuel-cell generator was used to produce electricity for a house. Use the balanced redox reactions and the standard cell potential to predict the volume of hydrogen gas (at STP) required each month to generate the electricity needed for a typical house. Assume the home uses 1100kWh of electricity per month. Express your answer using two significant figures.

Explanation / Answer

H2 can provide 38 kWh / kilogram
so
1100 kwh @ 1kg / 38 = 28.94 kilograms of H2
28.94 kilograms of H2 @ 1 kilomole / 2.016 kg H2 = 14.36 kilomoles
14.36 kilomoles @ 22.4 kilo litres / kilomole = 321.6 kilolitres
they would have your answer be: 321600 litres of H2



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2 H2O(l) + 2 e --> H2(g) + 2 OH

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