Interpretation: The reason for benzene to be a less desirable fuel as compared to methane needs to be explained.
Concept Introduction: The heat of combustion is defined as the amount of heat released when a substance is burned in the presence of air.
Explanation of Solution
According to the question, the heat of combustion of methane is -890 kJ/mol. This is the amount of heat released after the combustion of 1 mol of methane. This heat or energy then can be used for various purposes. The heat released or energy after combustion of 1 mol of benzene is more as compared to methane. The value is -3268 kJ/mol. Here, due to the release of higher energy, benzene should be a good fuel source but it is not the case. Benzene alone is never used as a fuel because it is very harmful to the environment and human health.
Long-term exposure to benzene can cause blood disorders, liver damage, and cancer. Benzene is
Due to above-mentioned reasons, benzene is not used as fuel alone.
Chapter 22 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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