5 L of an alkane requires 25 L of oxygen for its complete combustion. If all volumes are measured at constant temperature and pressure, the alkane is

Question

5 L of an alkane requires 25 L of oxygen for its complete combustion. If all volumes are measured at constant temperature and pressure, the alkane is, Isobutane, Ethane, Butane, Propane

MARKS App · Accepted Answer

Combustion of Hydrocarbon, C x H y + x + y 4 O 2 → x CO 2 + y 2 H 2 O ∴ n ∝ v ( P , T = C o n s t a n t ) for 1 mole of CxHy = x + y 4 , O 2 required for 5 L of CxHy = x + y 4 5 L , O 2 required ∴ ratio of alkane and O 2 is 5 / 25 So , x + y 4 5 = 25 x + y 4 = 5 , which is satisfied by C 3 H 8 .

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