When 6 grams of carbon is burned with 18 grams of oxygen, the combustion products contain 16.5g CO2, 2.8g CO, and other gases. What is the fractional conversion based on the limiting reactant?
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Answer: B. 95%
Explanation
Stoichiometric calculations show carbon is the limiting reactant in this combustion process. Mass balance equations determine the exact amount of carbon consumed to form products. The fractional conversion of the limiting reactant carbon is calculated to be ninety-five percent. Combustion reactions convert fuel carbon into carbon dioxide and carbon monoxide products. Limiting reactant analysis compares initial reactant masses against balanced stoichiometric ratios. Fractional conversion represents the fraction of the reactant that reacts during the process.
Reaction engineering problems require mass balances to determine reactor efficiency and conversion. Incomplete combustion generates toxic carbon monoxide alongside desired carbon dioxide emissions. Industrial combustion systems aim to maximize fuel conversion to improve overall energy efficiency. Option A represents complete conversion which does not account for the unreacted carbon. Option C underestimates the high conversion achieved by the limiting reactant in this system. Option D represents a very low conversion rate that contradicts the calculated stoichiometry.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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