The composition of the Earth's early atmosphere was very different from the composition of the Earth's atmosphere today - Edexcel - GCSE Chemistry - Question 2 - 2018 - Paper 1
Question 2
The composition of the Earth's early atmosphere was very different from the composition of the Earth's atmosphere today.
One of the planets has an atmosphere similar... show full transcript
Worked Solution & Example Answer:The composition of the Earth's early atmosphere was very different from the composition of the Earth's atmosphere today - Edexcel - GCSE Chemistry - Question 2 - 2018 - Paper 1
Step 1
letter of planet
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Answer
Mars
Step 2
explanation
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Answer
Mars has a thin atmosphere primarily composed of carbon dioxide, which shares some characteristics with the Earth’s early atmosphere. Early Earth had high levels of carbon dioxide, making Mars a suitable comparison.
Step 3
Write the balanced equation for this reaction.
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Answer
The balanced equation for the reaction between hydrogen and oxygen to form water is:
ightarrow 2H_2O$$
Step 4
This reaction can be carried out in the laboratory by igniting a mixture of hydrogen and air in a test tube.
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Answer
This reaction requires careful handling to avoid explosions. The ignition of hydrogen and oxygen produces a rapid release of energy, forming water as a product.
