13.4—How, if at all, a change in temperature, pressure or the presence of a catalyst affects the equilibrium composition in

Understand how, if at all, a change in temperature, pressure or the presence of a catalyst affects the equilibrium composition in a homogeneous or heterogeneous system.

Use —how, if at all, a change in temperature, pressure or the presence of a catalyst affects the equilibrium composition in to connect the rule to the data and decision in the question.

This matters because —how, if at all, a change in temperature, pressure or the presence of a catalyst affects the equilibrium composition in determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —how, if at all, a change in temperature, pressure or the presence of a catalyst affects the equilibrium composition in to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —How, if at all, a change in temperature, pressure or the presence of a catalyst affects the equilibrium composition in is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.