Table of Contents
Why liquid hydrogen Cannot be used easily as a fuel?
Hydrogen has the highest calorific value so it can be considered as the best fuel but it is highly inflammable so it is diificult to store, transport and handle so it is used as a fuel only where it is absolutely necessary.
Why is liquid hydrogen used as rocket fuel instead of hydrogen gas?
In combination with an oxidizer such as liquid oxygen, liquid hydrogen yields the highest specific impulse, or efficiency in relation to the amount of propellant consumed, of any known rocket propellant. Moreover, liquid hydrogen can leak through minute pores in welded seams.
Why is liquid oxygen used for rockets?
Combustion (burning something) releases energy, which makes things go. Start with fuel (something to burn) and an oxidizer (something to make it burn) and now you’ve got propellant. Give it a spark and energy is released, along with some byproducts. Liquid oxygen (LOX) serves as the oxidizer.
Why is hydrogen a good fuel?
However, hydrogen is useful as an energy source/fuel because it has a high energy content per unit of weight, which is why it is used as a rocket fuel and in fuel cells to produce electricity on some spacecraft. Hydrogen is not widely used as a fuel now, but it has the potential for greater use in the future.
Why hydrogen not used as a fuel though it has the highest calorific value?
Although hydrogen has the highest calorific value, it is not used as a domestic fuel. It is because hydrogen is a highly combustible and it reacts explosively when it comes in contact with air. So, even though hydrogen has the highest calorific value, it is not used as a domestic fuel.
What happens to hydrogen and oxygen?
Hydrogen molecules violently react with oxygen when the existing molecular bonds break and new bonds are formed between oxygen and hydrogen atoms. As the products of the reaction are at a lower energy level than the reactants, the result is an explosive release of energy and the production of water.
How does hydrogen and oxygen combine to form water molecules?
Two or more atoms may bond with each other to form a molecule. When two hydrogens and an oxygen share electrons via covalent bonds, a water molecule is formed.
How does liquid hydrogen work as a fuel?
Liquid hydrogen is typically used as a concentrated form of hydrogen storage. As for any gas, storing it as liquid takes less space than storing it as a gas at normal temperature and pressure. However, the liquid density is very low compared to other common fuels….Uses.
| RTECS | MW8900000 |
|---|---|
| ACGIH TLV-TWA | Simple asphyxiant |
Can liquid oxygen explode?
Liquid oxygen on its own does not burn or explode it is an oxidizer. If you mix it with organic materials such as paper, oils etc it acts as an oxidiser and those materials burn very vigorously, most will need a source of heat to initiate the reaction.
What happens when liquid oxygen burns?
Liquid oxygen causes injury because of rapid and profound cooling of the surrounding air, thus causing localized cold injury and cellular destruction. Because of its cryogenic characteristic, if liquid oxygen comes in contact with skin it causes numbness, severe skin irritation, and frostbite.
What happens when hydrogen and oxygen combine with water?
If the liquid hydrogen was more excess that oxygen. Then in then, you get a liquid combination of hydrogen and oxygen. This only happens when oxygen is soluble in water. With the normal level of lesser than 0.2 ppm. The result will be solid oxygen, liquid hydrogen, and some hydrogen vapor.
Why does hydrogen have a low activation energy?
Because hydrogen has a low activation energy only a small spark is needed to trigger a reaction with oxygen. Like all fuels, the reactants, in this case hydrogen and oxygen, are at a higher energy level than the products of the reaction.
Why is hydrogen and oxygen an exothermic reaction?
Like all fuels, the reactants, in this case hydrogen and oxygen, are at a higher energy level than the products of the reaction. This results in the net release of energy from the reaction, and this is known as an exothermic reaction.
Why can’t we use hydrogen to power a rocket launch?
To have enough to power a large combustion reaction would require an incredibly large tank to hold it – the opposite of what’s needed for an aerodynamically designed launch vehicle. To get around this problem, turn the hydrogen gas into a liquid, which is denser than a gas.