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Figure 8 shows some information about the composition of pollutant exhaust gases from the engines of two different vehicles - Edexcel - GCSE Chemistry - Question 5 - 2022 - Paper 1
Question 5
Figure 8 shows some information about the composition of pollutant exhaust gases from the engines of two different vehicles. pollutant mass of pollutant given out i... show full transcript
Worked Solution & Example Answer:Figure 8 shows some information about the composition of pollutant exhaust gases from the engines of two different vehicles - Edexcel - GCSE Chemistry - Question 5 - 2022 - Paper 1
Step 1
Give two ways in which the data in Figure 8 shows that the diesel engine is more damaging to the environment than the petrol engine.
Answer
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The diesel engine emits a higher amount of nitrogen oxides, with 2.0 g/km driven compared to 0.36 g/km for the petrol engine. Nitrogen oxides are harmful pollutants that contribute to smog and respiratory issues.
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The diesel engine releases more particulates, with 0.046 g/km driven compared to 0.006 g/km for the petrol engine. Particulates can cause severe health problems, including heart and lung diseases.
Step 2
Explain, using information from Figure 8, one way in which the diesel engine is less damaging to the environment than the petrol engine.
Answer
One way in which the diesel engine is less damaging is in the emissions of carbon monoxide. The diesel engine emits only 0.10 g/km driven, whereas the petrol engine emits a higher amount of 1.5 g/km. Carbon monoxide is a toxic gas, and lower emissions from the diesel engine indicate a lesser immediate health impact.