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)?