6.9—The terms ‘bond enthalpy’ and ‘mean bond enthalpy’

Understand the terms ‘bond enthalpy’ and ‘mean bond enthalpy’, and be able to use bond enthalpies to calculate enthalpy changes, understanding the limitations of this method.

Use —the terms ‘bond enthalpy’ and ‘mean bond enthalpy’ to connect the rule to the data and decision in the question.

This matters because —the terms ‘bond enthalpy’ and ‘mean bond enthalpy’ determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —the terms ‘bond enthalpy’ and ‘mean bond enthalpy’ to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —The terms ‘bond enthalpy’ and ‘mean bond enthalpy’ is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.