Bond Enthalpies

Question 1

Enthalpy Profile Diagrams

Answer 1

Diagrams that help us visualise the enthalpy change of a reaction.

Question 2

Activation Energy

Answer 2

An activation energy is the amount of energy required to break the bonds of the reactants and cause the reaction to occur

Question 3

Exothermic Reaction

Answer 3

When the energy released from the formation of bonds is greater than the energy required for the breaking of bond

Question 4

Endothermic

Answer 4

The Energy that is released from the making of bonds is less than the energy required to break the bonds

Question 5

Bond Breaking

Answer 5

Endothermic Process

Question 6

Bond Making

Answer 6

Exothermic Process

Question 7

Bond Enthalpy

Answer 7

Amount of energy required to break one mole of bonds

Question 8

Average bond enthalpy

Answer 8

Amount of energy required to break one mole of bonds, in the gaseous state averaged across many different compounds with that bond.

Question 9

Ozone

Answer 9

An Allotrope of oxygen with the formula O3, and has a much lower bond enthalpy than oxygen. This decomposes in UV light. Oxygen combines with free radicals to reform ozone.