Mean Bond Enthalpies

Question 1

What is bond enthalpy?

Answer 1

Bond enthalpy is the definite amount of energy you can assign to a particular bond

Question 2

What is bond association enthalpy?

Answer 2

The enthalpy change required to break a covalent bond with all species in the gaseous state

Question 3

Does the bond enthalpy differ depending on the molecule and does this affect the value? If yes, explain why

Answer 3

The same bond may have slightly different bond enthalpies in different molecules, but usually uses the average value

Question 4

What is the average value referred to as?

Answer 4

The mean bond enthalpy, often called the bond energy

Question 5

Explain the meaning of the term mean bond enthalpy:

Answer 5

The mean bond energy is the enthalpy needed to break the covalent bond into gaseous atoms, averaged over different molecules

Question 6

What are features mean bond enthalpies?

Answer 6

Mean bond enthalpies are averages, they are positive

Question 7

What is the equation of mean bond enthalpy?

Answer 7

△H = sum of bond energies broken - sum of bond energies made

Question 8

DO PRACTICE QUESTIONS

Answer 8

Do Practice Questions