Which is the correct order of bond energy of single, double and triple bonds between carbon atoms ?

Options

A. `C-C gt C=C gt C-=C`
B. `C=C gt C-=Cgt C-C`
C. `C-=C gt C-C gt C=C`
D. `C-=C gt C = C gt C-C`

Answer

To determine the correct order of bond energy for single, double, and triple bonds between carbon atoms, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Bond Order**:
- Bond order is defined as the number of bonds between two atoms. For carbon:
- A single bond (C-C) has a bond order of 1.
- A double bond (C=C) has a bond order of 2.
- A triple bond (C≡C) has a bond order of 3.

2. **Relationship Between Bond Order and Bond Energy**:
- Bond energy is the energy required to break a bond. It is generally observed that the higher the bond order, the greater the bond energy. This is because multiple bonds (double and triple) involve more shared electrons, which results in a stronger attraction between the bonded atoms.

3. **Comparing Bond Energies**:
- Based on the bond orders:
- C-C (single bond, bond order = 1) will have the lowest bond energy.
- C=C (double bond, bond order = 2) will have a higher bond energy than a single bond.
- C≡C (triple bond, bond order = 3) will have the highest bond energy.

4. **Establishing the Order**:
- Therefore, the order of bond energies from lowest to highest is:
- C-C < C=C < C≡C

5. **Final Answer**:
- The correct order of bond energy of single, double, and triple bonds between carbon atoms is:
- C-C < C=C < C≡C