DP Chemistry (first assessment 2025)
Question 20N.1A.HL.TZ0.21
| Date | November 2020 | Marks available | [Maximum mark: 1] | Reference code | 20N.1A.HL.TZ0.21 |
| Level | HL | Paper | 1A | Time zone | TZ0 |
| Command term | Identify | Question number | 21 | Adapted from | N/A |
21.
[Maximum mark: 1]
20N.1A.HL.TZ0.21
Which graph represents the relationship between the rate constant, , and temperature, , in kelvin?
[1]
Markscheme
C
Examiners report
60% of candidates selected the appropriate graph showing how rate constant, k, varies with temperature. Incorrect answers were equally split between a linear and inverse relationship.
Syllabus sections
Reactivity 2. How much, how fast and how far? » Reactivity 2.2—How fast? The rate of chemical change » Reactivity 2.2.12—The Arrhenius equation uses the temperature dependence of the rate constant to determine the activation energy. Describe the qualitative relationship between temperature and the rate constant. Analyse graphical representations of the Arrhenius equation, including its linear form.