DP Chemistry (first assessment 2025)

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Question 23M.2.SL.TZ1.11a

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Date May 2023 Marks available [Maximum mark: 2] Reference code 23M.2.SL.TZ1.11a
Level SL Paper 2 Time zone TZ1
Command term Calculate Question number a Adapted from N/A
a.
[Maximum mark: 2]
23M.2.SL.TZ1.11a
(a)

Calculate the mass of CO2 produced per 1000 kJ of heat obtained from the combustion of ethanol. Use section 13 of the data booklet.

[2]

Markscheme

«1000/1367=» 0.7315 «mol ethanol» ✓

«C2H6O + 3O2 → 2CO2 + 3H2O / each ethanol forms two carbon dioxides»

«0.7315 × 2 × 44.01 g mol−1 = »64 «g» ✓

 

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