DP Chemistry (last assessment 2024)

Question 22M.2.hl.TZ1.3a(i)

a(i).

[Maximum mark: 1]

22M.2.hl.TZ1.3a(i)

Ammonia is produced by the Haber–Bosch process which involves the equilibrium:

N₂(g) + 3 H₂(g) $⇌$ 2 NH₃(g)

The percentage of ammonia at equilibrium under various conditions is shown:

^{[The Haber Bosch Process [graph] Available at: https://commons.wikimedia.org/wiki/File:Ammonia_yield.png}
^{[Accessed: 16/07/2022].]}

(a(i))

Deduce the expression for the equilibrium constant, K_c, for this equation.

[1]

Markscheme

$K_{c} = \frac{{[N H_{3}]}^{2}}{[N_{2}] {[H_{2}]}^{3}}$ ✔

Examiners report

Deducing the equilibrium constant expression for the given equation was done very well.

Syllabus sections