ConceptConceptDocsDocuments

IB Chemistry HL 1.1.2 Endothermic vs. exothermic Question Bank

Practise IB Chemistry HL 1.1.2 by applying endothermic vs. exothermic to exam-style questions.

Syllabus
First assessment 2025
Course
Chemistry HL
Level
HL

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

1.1.2—Endothermic vs. exothermic question 1

[Maximum number: 1]

Two groups of students (Group A and Group B) carried out a project* on the chemistry of some group 7 elements (the halogens) and their compounds.

In the first part of the project, the two groups had a sample of iodine monochloride (a corrosive brown liquid) prepared for them by their teacher using the following reaction.

I2( s)+Cl2( g)→2ICl(l)\mathrm{I}_{2}(\mathrm{~s})+\mathrm{Cl}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{ICl}(\mathrm{l})

The following data were recorded.

Table for Question 1.1.2—Endothermic vs. exothermic question 1 — IB Chemistry HL

Using a digital thermometer, the students discovered that the reaction was exothermic. State the sign of the enthalpy change of the reaction, ΔH\Delta H.

All question bank results loaded