once the water molecule is broken will require same energy to bond together the oxygen and hydrogen will exist in separate moloecular states after giving off the energy
All the chemical reactions can be categorized in two types:
1. Endothermic reaction
2. Exothermic reaction
As the names suggest, Endothermic reactions absorb energy while Exothermic reactions release energy.
When chemical bonds are created by the process of Exothermic reaction, such as in case of creation of water, energy is released, and to reverse the process you need to put in energy just as much energy to break the bond to get the individual elements.
When Electrolysis breaks the bonds of water to separate Hydrogen, it gives in a specific amount of energy. While the same Hydrogen is burned as a fuel to create water as the by product, same amount of energy is released, but only a fraction of that released energy can be tapped to get any work done.
Thus, the amount of
energy required to separate Hydrogen will always be equal to the energy released,
but multiple times greater than the energy tapped, after burning the same Hydrogen.
Take this example:
100 units of Energy sent into the battery of the car to separate Hydrogen.
90 units of energy will be absorbed by battery to do the process, while 10 units will be dissipated in the form of sound and heat and vibrations of the atoms.
90 units of energy saved inside the Hydrogen atoms will be used to run the engine of the car.
30 units is the energy that will be used by the car its movement, with rest of it (60 joules) wasted in the form of heat and sound.
20 units of this energy will again be utilized by the car, while 10 units will be sent back to the battery to perform that Endothermic reaction.
10 units of energy utilized by the battery in the second term will in turn produce Hydrogen worth only 9 units of energy, and the process will go on with diminishing quantities.
This process can only be continued with the external input of energy, mainly from the fossil fuels, and make this process at least 10 times costlier than using the fossil fuel directly to move the car.
I wrote it for you because you appear to be the most ardent supporter of this fraud and the talk-show videos involving this man Waqar, and the Chairman of PCSIR Dr. Pervaiz Shoukat (who is wholeheartedly endorsing this idea) are making rounds in international online fora and no one is missing a chance to poke fun at the level of Pakistani intellectuals.
I hope you understand the level of disservice you are doing to the Pakistani community.