DP Chemistry (last assessment 2024)

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Question 21M.2.hl.TZ1.6a

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Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.2.hl.TZ1.6a
Level hl Paper 2 Time zone TZ1
Command term Suggest Question number a Adapted from N/A
a.
[Maximum mark: 1]
21M.2.hl.TZ1.6a

When dinitrogen pentoxide, N2O5, is heated the colourless gas undergoes thermal decomposition to produce brown nitrogen dioxide:

N2O5 (g) → 2NO2 (g) + 12O2 (g)

(a)

Suggest how the extent of decomposition could be measured.

[1]

Markscheme

use colorimeter
OR
change in colour
OR
change in volume
OR
change in pressure ✔

Accept suitable instruments, e.g. pressure probe/oxygen sensor.

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