Discussion
The oxygen required to burn 1 kg of carbon to carbon dioxide is
Answer: C
Correct answer: 2.67 kg
The reaction is \( \mathrm{C} + \mathrm{O_2} \rightarrow \mathrm{CO_2} \), so 12 kg of carbon takes 32 kg of oxygen and \[ \frac{32}{12} = 2.67\ \text{kg of oxygen per kg of carbon.} \] The figure 8 belongs to hydrogen and 1 to sulphur; together the three are the whole of Dulong’s oxygen calculation.
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