DP Chemistry (last assessment 2024)

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Question 19M.3.sl.TZ1.11b(i)

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.3.sl.TZ1.11b(i)
Level sl Paper 3 Time zone TZ1
Command term Calculate Question number b(i) Adapted from N/A
b(i).
[Maximum mark: 1]
19M.3.sl.TZ1.11b(i)

Natural gas is an energy source composed mainly of methane.

Natural gas is burned to produce steam which turns turbines in an electricity generating power plant.

The efficiency of several sources for power plants is given below.

(b(i))

Calculate the maximum electric energy output, in MJ, which can be obtained from burning 1.00 kg of methane by using your answer from (a).

[1]

Markscheme

«55.5 MJ × 58 % =» 32.2 «MJ»  [✔]

Examiners report

Many students were aware that methane is the major component of natural gas and could use the efficiency data to calculate the electrical energy available from methane.

Syllabus sections