DP Chemistry (first assessment 2025)
Question 19N.1A.SL.TZ0.19
Date | November 2019 | Marks available | [Maximum mark: 1] | Reference code | 19N.1A.SL.TZ0.19 |
Level | SL | Paper | 1A | Time zone | TZ0 |
Command term | Predict | Question number | 19 | Adapted from | N/A |
19.
[Maximum mark: 1]
19N.1A.SL.TZ0.19
What effect does increasing both pressure and temperature have on the equilibrium constant, Kc?
N2 (g) + 3H2 (g) 2NH3 (g) ΔH = −45.9 kJ
A. Decreases
B. Increases
C. Remains constant
D. Cannot be predicted as effects are opposite
[1]
Markscheme
A
Syllabus sections
Reactivity 2. How much, how fast and how far? » Reactivity 2.3—How far? The extent of chemical change » Reactivity 2.3.4—Le Châtelier’s principle enables the prediction of the qualitative effects of changes in concentration, temperature and pressure to a system at equilibrium. Apply Le Ch.telier’s principle to predict and explain responses to changes of systems at equilibrium.