CH 3 OH is used as an alternate fuel. It is burned with200 percent of theoretica

Question

CH3OH is used as an alternate fuel. It is burned with200 percent of theoretical air. The products of combustion arecooled to 100 kPa and 30oC. How much water is condensedper kilogram per fuel.

Explanation / Answer

2CH3OH + 3O2 -> 2CO2 +4H2O Molecular weight of CH3OH is = 12 + 4*1 + 16 = 32 64 g of Methanol gives 4*18 = 72 g of water 1 kg of Methanol gives = 72/64 kg of water                                         = 1.125 kg of water Given the conditions (Room Temperature and ˜ 1 atmospherepressure) we may assume that only a negligible amount of waterremains in the gaseous state and almost all of the 1.125 kg ofwater condenses.

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