Предмет: Химия, автор: EvgeniyaBentsa

який об'єм повітря потрібно для згоряння 140 л природного газу, що містить 90% метану?

Ответы

Автор ответа: vedeneeva8

якщо вважати, що крім метану інші домішки негорючі, то самого метану в природному газі 140*0,9=126 л
горіння вдбувається за хемою
СН₄ + 2О₂ = СО₂ + 2Н₂О
як видно, об'єм кисню вдвічі більший за об'єм метану, тобто = 126*2=252 л
В повітрі 21% кисню, тому самого повітря об'єм = (252*100%)/21% = 1200 л
або 1,2 м³

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