DP Chemistry (last assessment 2024)

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Question 21M.2.hl.TZ2.5a(ii)

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Date May 2021 Marks available [Maximum mark: 2] Reference code 21M.2.hl.TZ2.5a(ii)
Level hl Paper 2 Time zone TZ2
Command term Deduce Question number a(ii) Adapted from N/A
a(ii).
[Maximum mark: 2]
21M.2.hl.TZ2.5a(ii)

Ethanol and methanoic acid are important industrial products.

Ethanol is used as a fuel.

(a(ii))

Deduce the change in enthalpy, ΔH, in kJ, when 56.00 g of ethanol is burned. Use section 13 in the data booklet.

[2]

Markscheme

«n = 56.00 g46.08 g mol-1 =» 1.215 «mol» ✓

«1.215mol × (−1367 kJ mol−1) =» −1661 «kJ» ✓

 

Award [2] for correct final answer.

Award [1 max] for “«+»1661 «kJ»”.

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