DP Chemistry (first assessment 2025)

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Question 21M.1A.SL.TZ2.13

Date	May 2021	Marks available	[Maximum mark: 1]	Reference code	21M.1A.SL.TZ2.13
Level	SL	Paper	1A	Time zone	TZ2
Command term	State	Question number	13	Adapted from	N/A

13.

[Maximum mark: 1]

21M.1A.SL.TZ2.13

Which describes an exothermic reaction?

[1]

Markscheme

D

Syllabus sections

Reactivity 1. What drives chemical reactions? » Reactivity 1.1—Measuring enthalpy changes » Reactivity 1.1.2—Reactions are described as endothermic or exothermic, depending on the direction of energy transfer between the system and the surroundings. Understand the temperature change (decrease or increase) that accompanies endothermic and exothermic reactions, respectively.