DP Chemistry (first assessment 2025)
Question 22M.2.SL.TZ1.5d(ii)
| Date | May 2022 | Marks available | [Maximum mark: 2] | Reference code | 22M.2.SL.TZ1.5d(ii) |
| Level | SL | Paper | 2 | Time zone | TZ1 |
| Command term | Outline | Question number | d(ii) | Adapted from | N/A |
d(ii).
[Maximum mark: 2]
22M.2.SL.TZ1.5d(ii)
(d(ii))
Outline the requirements for a collision between reactants to yield products.
[2]
Markscheme
energy/E ≥ activation energy/Ea ✔
correct orientation «of reacting particles»
OR
correct geometry «of reacting particles» ✔
Examiners report
Good performance. For the requirements for a collision between reactants to yield products, some suggested necessary, sufficient or enough energy or even enough activation energy instead of energy/E ≥ activation energy/Ea.
Syllabus sections
Reactivity 2. How much, how fast and how far? » Reactivity 2.2—How fast? The rate of chemical change » Reactivity 2.2.2—Species react as a result of collisions of sufficient energy and proper orientation. Explain the relationship between the kinetic energy of the particles and the temperature in kelvin, and the role of collision geometry.