DP Chemistry (first assessment 2025)
Question 21M.1A.SL.TZ1.13
Date | May 2021 | Marks available | [Maximum mark: 1] | Reference code | 21M.1A.SL.TZ1.13 |
Level | SL | Paper | 1A | Time zone | TZ1 |
Command term | Interpret | Question number | 13 | Adapted from | N/A |
13.
[Maximum mark: 1]
21M.1A.SL.TZ1.13
When sodium carbonate powder is added to ethanoic acid, the beaker becomes cooler.
Possible enthalpy diagrams are shown.
Which correctly describes the reaction?
[1]
Markscheme
C
Syllabus sections
Reactivity 1. What drives chemical reactions? » Reactivity 1.1—Measuring enthalpy changes » Reactivity 1.1.3—The relative stability of reactants and products determines whether reactions are endothermic or exothermic. Sketch and interpret energy profiles for endothermic and exothermic reactions.