DP Chemistry (last assessment 2024)

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Question 19M.3.hl.TZ1.15a

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.3.hl.TZ1.15a
Level hl Paper 3 Time zone TZ1
Command term Calculate Question number a Adapted from N/A
a.
[Maximum mark: 1]
19M.3.hl.TZ1.15a

Natural gas is an energy source composed mainly of methane.

(a)

Calculate the specific energy of methane, in MJ kg−1, using sections 1, 6 and 13 of the data booklet.

[1]

Markscheme

«  891 kJ mo l − 1 16.05 g mo l − 1 =» 55.5 kJ g–1 =» 55.5 «MJ kg–1» ✔

Examiners report

Calculations of specific energy of methane and the maximum electric energy output in parts (a) and (b)(i) were done well.

Syllabus sections