Bond Length And Bond Energy

Question 1

Bond length

Answer 1

Is the average distance between the two nuclei of two atoms in a molecule

Question 2

3 factors that influence bond length

Answer 2

1. Size of the atom: bond length increases as size increases
2. Difference in electronegativity: a greater difference leads to a greater bond and thus a shorter bond length
3. Bond order: The higher the number of bonds the smaller the bond length

Question 3

Bond energy

Answer 3

Is the amount of energy necessary to break on mol of a specific covalent bond in the gaseous state

Question 4

Relation between bond length and bond energy

Answer 4

There is an inverse relation between bond length and bond energy:

• the stronger the bond, the shorter the bond length and the higher the bond energy OR
• the weaker the bond, the longer the bond length and the lower bond energy

Question 5

Factors the influence bond strength

Answer 5

1. Bond energy: the greater the bond energy, the greater the bond strength
2. Bond length: shorter bonds are stronger than longer bonds
3. Size of the atoms: bonds between smaller atoms are shorter and therefore stronger
4. Bond energy: double bonds and triple bonds are stronger than single bonds. The higher the bond order, the stronger the bond