Question

Hydrogen bond energy (per mole) is about:
A.10KCal
B.10Joules
C.10ergs
D.10eV

Answer 1

Hint: hydrogen bond is a defined as an electrostatic force of attraction between a hydrogen atom which is covalently bonded to a more electronegative atom or group. It consists of intramolecular and intermolecular hydrogen bonding. Hydrogen bond energy is less than the covalent bond energy.

Complete step by step answer:
A hydrogen bond is a force of attraction between a hydrogen atom which is covalently bonded to a more electronegative atom or group .
Hydrogen bonds have covalent as well as electrostatic force of attraction. Hydrogen bonds are of two types that are intermolecular hydrogen bondings and intramolecular hydrogen bonding.
Intramolecular hydrogen bonding is defined as a bonding that occurs within a same molecule whereas intermolecular hydrogen bonding is defined as a bonding that occurs between two or more molecules.
The energy of the hydrogen bond lies between1 and 40 Kcal/mol$. Hence, this makes them stronger than the van der waals force of attraction and weaker than the covalent and ionic bonds.
The energy of hydrogen bonds is less as compared to the energy of covalent bonds which makes the hydrogen bonds weaker and therefore the hydrogen bond energy is about 10Kcal.

So, the correct answer is “Option A”.

Note: Hydrogen bonding plays a very vital role in the structure of polymers, both synthetic and natural.
Hydrogen bond is responsible for the chemical and physical properties of compounds having oxygen, nitrogen and fluorine. They show interaction with hydrogen bonds and form intermolecular hydrogen bonding.
Hydrogen bonds occur in the formation of proteins and DNA.
Hydrogen bonding is a type of dipole dipole attraction between a molecule.