DP Chemistry (last assessment 2024)

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Question 18N.3.sl.TZ0.b.i

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Date November 2018 Marks available [Maximum mark: 1] Reference code 18N.3.sl.TZ0.b.i
Level sl Paper 3 Time zone TZ0
Command term Calculate Question number b.i Adapted from N/A
b.i.
[Maximum mark: 1]
18N.3.sl.TZ0.b.i

Coal can be converted to clean-burning synthetic natural gas.

Automobile companies use hydrogen as an alternative to fossil fuels. Some properties of fuels are shown.

Calculate the specific energy, in kJ g−1, of methane.

[1]

Markscheme

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

 

Do not penalize negative sign.

Do not accept energy density at STP/density at STP = 39.3 0.707  = 55.06 «kJ g–1».

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