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IB Chemistry SL 2.2.4 Activation energy (Ea) Question Bank

Practise IB Chemistry SL 2.2.4 by applying activation energy (ea) 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

2.2.4—Activation energy (Ea) question 1

[Maximum number: 2]

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

Figure for Question 2.2.4—Activation energy (Ea) question 1 — IB Chemistry SL

Question (a)

(a)

Sketch the Maxwell-Boltzmann distribution curve for 298 K on the same axes as the 900 K curve.

Figure for Question (a) — IB Chemistry SL
[ 1 ]

Question (b)

(b)

Annotate the graph to show the activation energy, EaE_{\mathrm{a}}.

[ 1 ]
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