B.0.0—Units in calculations

Recognise and use appropriate units in calculations, including unit conversions. At A2 this includes units for equilibrium and rate constants and conversions between entropy in J mol⁻¹ K⁻¹ and enthalpy changes in kJ mol⁻¹.

Use b.0.0—units in calculations to connect the rule to the data and decision in the question.

This matters because b.0.0—units in calculations determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply b.0.0—units in calculations to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: B.0.0—Units in calculations is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.