Why bond dissociation energy of H2 is high?

Why bond dissociation energy of H2 is high?

Hydrogen has a relatively small atom and short bondlength hence very strong strong attractions between the atoms which will consenquently increase its bond dissociation ethalpy.

Does H2 have higher bond dissociation energy than D2?

Larger amount of energy is required to break bond of D2 as compared to H2 in simple eords Bond dissociation energy (BDE) of D2 is higher than H2 also D2 act more inertly than H2.

What happens when two hydrogen atoms are closer together?

As the two hydrogen atoms move closer and closer together, the potential energy continues to decrease. The point at which the potential energy reached its minimum represents the ideal distance between hydrogen atoms for a stable chemical bond to occur. This type of chemical bond is called a covalent bond.

What is the dissociation energy of molecules?

3.7 Bond Dissociation Energies The bond dissociation energy is the energy required—an endothermic process—to break a bond and form two atomic or molecular fragments, each with one electron of the original shared pair.

Why is h2 more reactive than D2?

Larger amount of energy is required to break bonds between D2 as bond dissociation energy of D2 is higher as compared to H2. Therefore H2 is reactive as compared to D2.

How does the energy of the system vary when two hydrogen atoms are brought closer to each other?

Remember that the lower potential energy increases the stability of the system. As the two hydrogen atoms move closer and closer together, the potential energy continues to decrease. The single electrons from each of the two hydrogen atoms are shared when the atoms come together to form a hydrogen molecule (H 2 ).

Why does the energy decrease as the two atoms come together?

In other words, the atoms exert forces on each other. As the atoms move closer together, these forces are doing work and, because the force is acting in the same direction as the movement, the work decreases the potential energy.

What is bond dissociation energy 12?

The Bond Dissociation Enthalpy refers to the amount of energy that is required during an endothermic process to break a chemical bond and produce two separated atoms, each with one electron of the first mutual pair.