DP Chemistry (last assessment 2024)
Question 17N.2.hl.TZ0.a.iii
| Date | November 2017 | Marks available | [Maximum mark: 1] | Reference code | 17N.2.hl.TZ0.a.iii |
| Level | hl | Paper | 2 | Time zone | TZ0 |
| Command term | Determine | Question number | a.iii | Adapted from | N/A |
a.iii.
[Maximum mark: 1]
17N.2.hl.TZ0.a.iii
Many reactions are in a state of equilibrium.
The following reaction was allowed to reach equilibrium at 761 K.
H2 (g) + I2 (g) 2HI (g) ΔHθ < 0
Determine the value of ΔGθ, in kJ, for the above reaction at 761 K using section 1 of the data booklet.
[1]
Markscheme
ΔGθ = «– RT ln K = – (0.00831 kJ K−1 mol−1 x 761 K x ln 45.6) =» – 24.2 «kJ»
