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IB Chemistry SL 1.1.3 Stability and energy Question Bank

Practise IB Chemistry SL 1.1.3 by applying stability and energy to exam-style questions.

Syllabus
First assessment 2025
Course
Chemistry SL
Level
SL

Exam points

  • identify the relevant chemical structure, process or evidence
  • apply the correct chemical model or equation
  • evaluate the result using chemical reasoning and data

1.1.3—Stability and energy question 1

[Maximum number: 3]

Phenylethene (styrene) is produced from ethylbenzene in a gas-phase equilibrium.

Figure for Question 1.1.3—Stability and energy question 1 — IB Chemistry SL

The forward reaction is endothermic, uses iron(III) oxide as a catalyst, and takes place at 900 K .

Sketch the energy profile for the reaction, both with and without the catalyst, labelling ΔH\Delta H and the activation energies.

Figure for Question 1.1.3—Stability and energy question 1 — IB Chemistry SL
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