How much energy does hydrogen and oxygen produce?

When one mole of hydrogen molecules (two grams) combines with half a mole of oxygen molecules (16 grams) to form one mole of water molecules (18 grams), the energy given off turns out to be 242,000 joules, assuming that the water comes out as a gas rather than as a liquid.

Does hydrogen need oxygen for energy?

Hydrogen fuel combines with oxygen from the air through a fuel cell, creating electricity and water through an electrochemical process.

How much energy does hydrogen gas have?

By contrast, hydrogen has an energy density of approximately 120 MJ/kg, almost three times more than diesel or gasoline. In electrical terms, the energy density of hydrogen is equal to 33.6 kWh of usable energy per kg, versus diesel which only holds about 12–14 kWh per kg.

Why hydrogen is not used as a fuel?

But it is not used as domestic fuel, due to several reasons : Hydrogen is not easily available and cost of production is high Unlike other gases, hydrogen is not readily available in the atmosphere. It requires processes like electrolysis of water for its production. This is a very costly process and time consuming.

Will hydrogen be the fuel of the future?

Clean hydrogen is touted as the future fuel of the EU, promising to deliver an abundance of carbon-neutral energy by 2030. It will power long haul freight vehicles, airplanes, steel production and domestic heating, proponents say.

Why don’t we use hydrogen as a fuel?

It doesn’t exist on its own and needs to be extracted from water using electrolysis which in itself is a complicated process. The energy needs tons of investments and political backing in order to become a viable source of energy. Without it the proper infrastructure to use hydrogen as a fuel cannot be created.

How is hydrogen used for energy?

Hydrogen can be used in fuel cells to generate electricity, or power and heat. Today, hydrogen is most commonly used in petroleum refining and fertilizer production, while transportation and utilities are emerging markets.

How much energy is 1kg of hydrogen?

33.33 kWh
Hydrogen is an excellent energy carrier with respect to weight. 1 kg of hydrogen contains 33.33 kWh of usable energy, whereas petrol and diesel only hold about 12 kWh/kg (see www.h2data.de).

How much energy is in a liter of hydrogen?

Hydrogen at 50 atmospheres pressure provides about 0.13 kilowatt-hours per litre, and liquid hydrogen provides 2.36 kilowatt-hours per litre. (Petrol or oil provide about 10 kilowatt-hours per litre.)