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Why can't we make water?
We can, by igniting hydrogen and condensing the vapours. But it takes more energy to produce hydrogen!
How can water be used as electrical energy?
There is no useable electrical energy in water. But if by electrolysis the water can be split into separate hydrogen and oxygen components which are collected separately, the hydrogen can be burnt as a fuel. When the hydrogen is burnt, no more energy is produced than what went into the original electrolysis, so the water is not a source of energy, it is more of a way to store energy. Moving water can be used to generate electricity, in hydroelectric schemes and in tidal and wave generators.
What are the disadvantages of using water as a hydrogen fuel source?
It takes more energy to separate the hydrogen than we can get at the end.
Why does water require so much energy to change its phase?
Water requires a lot of energy to change its phase because of its strong hydrogen bonds. When heating water, energy is needed to break these bonds so that the water molecules can move more freely from a solid to a liquid or a liquid to a gas. Similarly, when cooling water, energy is released as the water molecules form more stable hydrogen bonds in the solid or liquid state.
Which is lower in energy a mixture of hydrogen and oxygen gases or liquid water How do you know Which of the two is more stable How do you know?
Liquid water is lower in energy compared to a mixture of hydrogen and oxygen gases because the formation of water from these gases releases energy through an exothermic reaction, indicating that the products (water) are more stable than the reactants (hydrogen and oxygen). Stability is determined by the energy state; since water is in a lower energy state, it is more stable than the gaseous mixture. This can be confirmed by the fact that water remains in liquid form under standard conditions, while hydrogen and oxygen gases readily react under the right conditions.
Oxygen and hydrogen helps to fire then why water prevent fire?
The electrons in the oxygen and hydrogen have a high amount of energy which is released when the oxygen and hydrogen combine to form water. The electrons are in a more stable set of bonds. The water then has no chance of bonding to decrease energy, so the water absorbs heat by cooling and boiling, so that the fire goes out.
How is hydrogen an alterative energy source?
Since there are no significant amounts of free hydrogen, it should be considered more of an energy storage than an energy source. In other words, it takes energy to separate water into hydrogen and oxygen; you get that energy back when the hydrogen is burned.
Will the energy produced on combustion of hydrogen be more than the energy used for separation of hydrogen from water through electrolysis?
In theory, the energy produced by creating four oxygen-hydrogen bonds after breaking two Oxygen-oxygen and hydrogen-hydrogen bonds in the reaction O2 + 2H2 -> 2H2O (hydrogen combustion in oxygen) is exactly the same than the energy needed to break four oxygen-hydrogen bonds to create two oxygen-oxygen and hydrogen-hydrogen bonds in the reaction 2H2O -> O2 + 2H2 (water electrolysis) However, you will always have great energy loss during electrolysis (an important part of your energy will be used to warm up your water) and in getting back your energy from your oxygen and hydrogen gas (a combustible battery or a motor will warm up too).
Does the reaction that separates water into hydrogen and oxygen absorb or release energy?
Endothermic reaction is the breakdown of water into hydrogen and oxygen and this cause for energy to be absorbed
Does water molecule break free of hydrogen bond as the temperature of water increases?
Yes, as the temperature of water increases, the hydrogen bonds between water molecules weaken and eventually break, allowing the molecules to move more freely and increasing the water's kinetic energy. This can result in the water transitioning from a solid to a liquid state (melting) and then to a gas state (vaporization) as more energy is added.
Which is more stable in this reaction 2H2O energy - 2H2 O2?
In the reaction 2H₂O → 2H₂ + O₂, water (H₂O) is more stable than hydrogen (H₂) and oxygen (O₂) under standard conditions. This is because water is a low-energy compound, while the products, hydrogen and oxygen gases, possess higher energy due to their molecular bonds. As a result, the formation of water from its elemental gases releases energy, indicating that water is the more stable product in this reaction.
Is energy in water from hydrogen molecules?
No. The hydrogen and oxygen in water are combined into a single substance; it does not get one property from hydrogen or another from oxygen but rather has its own unique set of properties based on how they are combined. It is unclear what "energy" you are referring to.
