DP Chemistry (last assessment 2024)

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Question 21M.2.sl.TZ1.b(i)

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Date May 2021 Marks available [Maximum mark: 2] Reference code 21M.2.sl.TZ1.b(i)
Level sl Paper 2 Time zone TZ1
Command term Draw Question number b(i) Adapted from N/A
b(i).
[Maximum mark: 2]
21M.2.sl.TZ1.b(i)

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

N2O5 (g) → 2NO2 (g) + 12O2 (g)

Data for the decomposition at constant temperature is given.

Plot the missing point on the graph and draw the best-fit line.

[2]

Markscheme

point correct ✔

straight line passing close to all points AND through origin ✔


Accept free hand drawn line as long as attempt to be linear and meets criteria for M2.

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