Question

The bond energy ( in kcal $mo{{l}^{-1}}$) of a C-C single bond is approximately:
(A) 1
(B) 10
(C) 100
(D) 1000

Answer 1

Hint: The bond energy of a chemical bond is directly proportional to the stability of that bond. This implies that the greater the bond energy of a given chemical bond between two atoms, the greater the stability of that chemical bond.

Complete step by step answer:
Bond Energy, also known as average bond enthalpy or simply bond enthalpy, is a quantity that offers insight into the strength of a chemical bond. The IUPAC definition of the term ‘bond energy’ can be written as: “the average value obtained from the bond dissociation enthalpies (in the gaseous phase) of all the chemical bonds of a specific type in a given chemical compound. Therefore, the bond energy of a chemical bond in a given compound can be visualized as the average amount of energy required to break one such chemical bond. The bond energy of a C-C single bond is approximately in kcal $mo{{l}^{-1}}$ is approximately 100.
The bond energy of a C-C single bond is approximately in kJ/mol is approximately 346.
So, the correct answer is “Option C”.

Note: Calorie is defined as the amount of heat required at a pressure of 1 standard atmosphere to raise the temperature of 1 gram of water ${{1}^{{}^\circ }}$ Celsius. Since 1925 this calorie has been defined in terms of the joule, the definition since 1948 being that one calorie is equal to approximately 4.2 joules.