IB skill practice

Calculate entropy changes and predict entropy trends

Paper 1, Paper 2 5 marks Difficulty 4

Predict entropy trend from gas moles

A reaction in a materials-analysis workshop changes from 1 mole(s) of gas to 3 mole(s) of gas. Predict the entropy trend. 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.