In the complete combustion of alkanes, the alkane reacts with oxygen to produce carbon dioxide and water only - Edexcel - GCSE Chemistry - Question 7 - 2023 - Paper 2
Question 7
In the complete combustion of alkanes, the alkane reacts with oxygen to produce carbon dioxide and water only.
(a) Pentane, C5H12, is an alkane.
The equation for t... show full transcript
Worked Solution & Example Answer:In the complete combustion of alkanes, the alkane reacts with oxygen to produce carbon dioxide and water only - Edexcel - GCSE Chemistry - Question 7 - 2023 - Paper 2
Step 1
What is the value of w needed to balance the equation for the reaction?
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Answer
To find the value of w in the combustion equation, we need to balance the equation. The complete combustion of pentane, C5H12, involves reacting it with oxygen. The balanced equation is:
C5H12+8O2→5CO2+6H2O
Here, the value of w is 5. Therefore, the correct answer is B 5.
Step 2
What happens to pentane in this reaction?
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Answer
During the complete combustion of pentane, it reacts with oxygen and is oxidized to produce carbon dioxide and water. Consequently, pentane is oxidized in this reaction. The correct answer is C pentane is oxidised.
