12.16—Define the terms ‘enthalpy change of solution, ∆solH’ and ‘enthalpy change of hydration, ∆hydH of an ion’

Be able to define the terms ‘enthalpy change of solution, ∆solH’ and ‘enthalpy change of hydration, ∆hydH of an ion’.

Use —define the terms ‘enthalpy change of solution, ∆solh’ and ‘enthalpy change of hydration, ∆hydh of an ion’ to connect the rule to the data and decision in the question.

This matters because —define the terms ‘enthalpy change of solution, ∆solh’ and ‘enthalpy change of hydration, ∆hydh of an ion’ determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —define the terms ‘enthalpy change of solution, ∆solh’ and ‘enthalpy change of hydration, ∆hydh of an ion’ to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —Define the terms ‘enthalpy change of solution, ∆solH’ and ‘enthalpy change of hydration, ∆hydH of an ion’ is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.