Need guidance with Chemistry - energy related

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SUMMARY

The discussion focuses on calculating the decrease in ocean levels if hydrogen gas is used as a fuel source for transportation instead of liquid hydrocarbon fuels. The annual energy consumption for transportation is approximately 1017 kJ. To determine the ocean level decrease, the steps include calculating the energy produced from oxidizing one mole of hydrogen, determining the total moles of hydrogen needed, calculating the corresponding water volume required, and finally, computing the decrease in sea level based on that volume.

PREREQUISITES
  • Understanding of thermodynamics, specifically energy calculations related to chemical reactions.
  • Knowledge of electrolysis processes, particularly electrolyzing seawater for hydrogen production.
  • Familiarity with mole concept and molar calculations in chemistry.
  • Basic understanding of oceanography and sea level measurement.
NEXT STEPS
  • Calculate the energy produced from the oxidation of one mole of hydrogen gas.
  • Determine the total moles of hydrogen required to meet a demand of 1017 kJ.
  • Research the volume of water needed to produce the required moles of hydrogen.
  • Explore the implications of hydrogen fuel on ocean levels and environmental impact.
USEFUL FOR

Chemistry students, environmental scientists, and energy policy analysts interested in alternative fuel sources and their impact on global sea levels.

timsher
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Hey guys, I'm really lost on this question...could somebody please point me in the right direction?



The annual world use of liquid hydrocarbon fuels for transportation purposes currently generates about 10^17 kJ. If we could instead run our transportation system by oxidizing hydrogen gas to gaseous water, we would likely have to obtain the hydrogen by electrolyzing water. Suppose we made and stored enough hydrogen for 100 years by electrolyzing seawater. By how much would the level of the oceans decrease (in m)?


Thanks!
 
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I'm not entirely sure on how to work out the answer but this may point you in the right direction :

1st calculate the amount of energy the oxidation of one mole of hydrogen produces
2nd calculate how many moles of hydrogen would be needed to meet the demand of 10^17kJ
3rd calculate how much water would be required to meet the demand of that many moles of hydrogen
4th calculate the volume of water that is equivalent to then work out the decrease in the sea level
 

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