A gasoline car is a car that hypothetically boosts its energy directly from the water. Water powered cars have been the subject of many international patents, newspapers and magazine articles popular science, local television news coverage and websites. It has been discovered that the accusations related to these devices are pseudoscience and some have been found related to investment fraud. It can be argued that these vehicles produce fuel from the water on board without any other energy input, or perhaps a hybrid that purports to get some of its water energy in addition to a conventional source (such as gasoline).
Water is completely oxidized hydrogen. Hydrogen itself is a high energy flammable substance, but its useful energy is released when water is formed. The water does not burn. The electrolysis process can divide water into hydrogen and oxygen, but it takes so much energy to separate a molecule of water that has been released when the hydrogen has been oxidized to form water. In fact, some energy would be lost in the conversion of water into hydrogen, then burning hydrogen, because some lost heat would always be produced in the conversions. The release of the chemical energy from water, either in excess or in proportion to the energy required to facilitate this production, would therefore violate the first or second law of thermodynamics.
Extract energy from water
According to the laws of physics currently accepted, there is no way to extract chemical energy from water alone. The water itself is very stable: it is one of the classic elements and contains very strong chemical bonds. Its formation enthalpy is negative (-68.3 kcal / mol or -285.8 kJ / mol), which means that energy is needed to break these stable bonds, separate the water in its elements and there are no other hydrogen compounds and oxygen with more enthalpies of negative formation, which means that energy can not be released in this way either.
Most water powered cars rely on some form of electrolysis to separate water into hydrogen and oxygen and then recombine to release energy; however, because the energy needed to separate the elements will always be at least as large as the useful energy released, this can not be used to produce net energy.
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