DP Chemistry (last assessment 2024)

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Question 22M.2.sl.TZ1.2d(iii)

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.2.sl.TZ1.2d(iii)
Level sl Paper 2 Time zone TZ1
Command term Suggest Question number d(iii) Adapted from N/A
d(iii).
[Maximum mark: 1]
22M.2.sl.TZ1.2d(iii)

Ammonia, NH3, is industrially important for the manufacture of fertilizers, explosives and plastics.

The effect of temperature on the position of equilibrium depends on the enthalpy change of the reaction.

(d(iii))

Suggest why the values obtained in (d)(i) and (d)(ii) differ.

[1]

Markscheme

«N-H» bond enthalpy is an average «and may not be the precise value in NH3» ✔


Accept it relies on average values not specific to NH3

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