Coal seam gas is used to generate electricity - VCE - SSCE Chemistry - Question 5 - 2018 - Paper 1
Question 5
Coal seam gas is used to generate electricity.
Which one of the following statements applies to coal seam gas?
A. Coal seam gas is mostly methane and is found natu... show full transcript
Worked Solution & Example Answer:Coal seam gas is used to generate electricity - VCE - SSCE Chemistry - Question 5 - 2018 - Paper 1
Step 1
A. Coal seam gas is mostly methane and is found naturally in commercial quantities near some coal deposits.
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Answer
This statement is accurate. Coal seam gas primarily consists of methane, a significant natural gas component found in commercial quantities near coal deposits.
Step 2
B. Burning coal produces less greenhouse emissions, by mass, than burning coal seam gas.
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This statement is generally incorrect. Burning coal seam gas tends to produce less greenhouse gas emissions compared to burning coal.
Step 3
C. Water released during the extraction of coal seam gas is used to irrigate farms.
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This statement can be misleading. While water is released during extraction, it is often considered a waste product and can have environmental implications rather than being directly used for irrigation.
Step 4
D. Coal seam gas is extracted from decomposing plant and animal material.
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This statement is inaccurate. Coal seam gas is primarily formed from the decomposition of organic matter under heat and pressure conditions specific to coal formation, not directly from decomposing plant and animal material.
