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When a hydrocarbon fuel burns is excess air orsat analysis of products of combustion will show
  • a)
    CO, CO2 and N2
  • b)
    CO2, CO, N2 and H2O
  • c)
    CO2, N2, O2 and H2O
  • d)
    CO2, N2 and O2
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
When a hydrocarbon fuel burns is excess air orsat analysis of products...
When a hydrocarbon fuel burns in excess air, the products of combustion can be analyzed using Orsat analysis. Orsat analysis is a method used to determine the composition of a gas mixture, specifically the volume percentage of its individual components. In the case of hydrocarbon fuel combustion, the products typically include carbon dioxide (CO2), nitrogen gas (N2), and oxygen gas (O2).

The correct answer is option 'D' which includes CO2, N2, and O2 as the products of combustion. Let's break down why this is the correct answer:

1. Carbon Dioxide (CO2):
During the combustion of hydrocarbon fuels, carbon atoms in the fuel combine with oxygen from the air to form carbon dioxide (CO2). This is a common byproduct of complete combustion and is responsible for the greenhouse effect and global warming.

2. Nitrogen Gas (N2):
The air we breathe is predominantly composed of nitrogen gas (N2). When hydrocarbon fuels burn in excess air, the high temperature of the combustion process causes nitrogen from the air to react with oxygen, resulting in the formation of nitrogen gas.

3. Oxygen Gas (O2):
Since the combustion is carried out in excess air, there is always an abundant supply of oxygen available. However, not all of the oxygen reacts with the fuel. Some of it remains unreacted and is present in the products of combustion.

4. Exclusion of Water Vapor (H2O):
The options mentioned in the question do not include water vapor (H2O) as one of the products of combustion. This is because the combustion of hydrocarbon fuels in excess air typically produces water vapor as a byproduct. However, it is not included in the answer options provided.

By analyzing the products of combustion using Orsat analysis, we can determine the percentage of each component present in the gas mixture. This information is crucial for various applications, including environmental monitoring, combustion efficiency analysis, and emissions control.
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