DP Chemistry (last assessment 2024)

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Question 20N.2.hl.TZ0.c

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.2.hl.TZ0.c
Level hl Paper 2 Time zone TZ0
Command term Justify, Predict Question number c Adapted from N/A
c.
[Maximum mark: 1]
20N.2.hl.TZ0.c

An equation for the combustion of propane is given below.

C3H8(g) + 5O2(g) 3CO2(g) + 4H2O(g)

Predict, giving a reason, whether the entropy change, ∆S⦵, for this reaction is negative or positive.

 

[1]

Markscheme

positive AND more moles «of gas» in products ✔

Examiners report

Most knew that entropy increased however some lost the mark by not including an explanation based on increase number of mol of gaseous products.

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