Reverse a Hess law step
A Hess cycle in a school extension laboratory uses a forward step with \(\Delta H=-60\,\text{kJ mol}^{-1}\). What enthalpy change should be used if that step is reversed? Use the labelled diagram, graph, or data table before calculating. Enter the answer and choose the interpretation that matches the HL chemistry evidence.
Worked practice: chemistry evidence and answer
Use the chemical evidence first, then enter the result and interpretation that match it.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.