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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 give... 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
i) 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 significantly higher amount of nitrogen oxides (2.20 g/km) compared to the petrol engine (0.36 g/km). Nitrogen oxides are known to contribute to the formation of smog and acid rain, making their higher emissions from the diesel engine more damaging to the environment.
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The diesel engine releases more particulates (0.046 g/km) than the petrol engine (0.005 g/km). Particulates are harmful to human health and the environment, thus making the diesel engine more damaging.
Step 2
ii) 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 the diesel engine is less damaging is that it emits lower levels of carbon monoxide, producing only 0.10 g/km compared to the petrol engine's emission of 1.5 g/km. Carbon monoxide is a toxic gas that can have severe health implications, so the significantly lower emission from the diesel engine indicates it is less damaging in this aspect.