DP Chemistry (first assessment 2025)
Question 22M.1A.SL.TZ2.13
| Date | May 2022 | Marks available | [Maximum mark: 1] | Reference code | 22M.1A.SL.TZ2.13 |
| Level | SL | Paper | 1A | Time zone | TZ2 |
| Command term | Apply | Question number | 13 | Adapted from | N/A |
13.
[Maximum mark: 1]
22M.1A.SL.TZ2.13
What is correct about energy changes during bond breaking and bond formation?
[1]
Markscheme
C
Examiners report
55% of the candidates selected the correct statements about bond breaking and bond formation. The most commonly chosen distractor reversed them. The question discriminated well between high-scoring and low-scoring candidates.
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.