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Could some kind chemistry pro here tell me the energy required for molecular separation of water into H and O2?
Thxs.
Thxs.
chem_tr said:What do you mean by molecular separation? Some kind of electrolysis-related phenomenon?
[tex]H_2O \rightarrow H_2 + O_2[/tex]
The energy required to undergo redox can be found by the following half reactions:
[tex]4H^+ + 4e^- \rightarrow 2H_2[/tex]
[tex]2O^{2-} \rightarrow O_2 + 4e^-[/tex]
Find the energy amounts required (or given out) for these half reactions, and add them; I love this property of thermodynamics
Gokul43201 said:If you are looking for the bonding energy of water (since your thread is titled so), you must use Hess' Law, with the following reactions :
[tex]2H_2 + O_2 \longrightarrow 2H_2O[/tex]
[tex]O_2 \longrightarrow 2O[/tex]
[tex]H_2 \longrightarrow 2H [/tex]
Dexter's equation tells you the enthalpy of formation, but this does not give you the bond energy. To get the bond energies, you must also consider the dissociation enthalpies of oxygen and hydrogen (and remember that there are 2 bonds per water molecule).
Molecular separation of water involves using energy to break the bonds between the hydrogen and oxygen atoms in water molecules. This separates the molecules into their individual components, hydrogen and oxygen.
The most common types of energy used for molecular separation of water are electricity, heat, and light. These forms of energy can be used to break the bonds between the hydrogen and oxygen atoms in water molecules.
The amount of energy needed for molecular separation of water varies depending on the method used and the efficiency of the process. However, on average, it takes about 237.13 kJ/mol of energy to separate water molecules into hydrogen and oxygen.
Molecular separation of water has several benefits, including producing clean and renewable energy in the form of hydrogen fuel, reducing greenhouse gas emissions, and providing a potential solution for energy storage.
One major challenge of molecular separation of water is the high amount of energy needed, which can make it expensive and not as efficient as other energy sources. Additionally, there are currently limited technologies for large-scale implementation of this process.