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Carbon oxidised only to monoxide instead of dioxide releases roughly

  • A.none of its calorific value at all
  • B.30 per cent of its calorific value
  • C.70 per cent of its calorific value
  • D.the whole of its calorific value

Answer: B

Burning carbon to monoxide gives about 2430 kcal per kilogram against 8080 for complete combustion, so some seventy per cent of the heat leaves the furnace still chemically locked in the gas. It is why even a few tenths of a per cent of monoxide is a serious loss.

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