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 : (A) Ethane (B) Propane (C) Butane (D) Isobutane

Tardigrade Admin · Accepted Answer

Combustion of Hydrocarbon: CxHy+(X+(y/4))O2arrow X CO2+(y/2)H2O 1 : (X+(y/4)) ∴ x=(y/4)=5 which is satisfied by C3H8 (Propane)

Q. 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 :

Ethane

Propane

Butane

Isobutane

Combustion of Hydrocarbon:
$C_{x} H_{y} + (X + \frac{y}{4}) O_{2} \to X C O_{2} + \frac{y}{2} H_{2} O$
$1 : (X + \frac{y}{4})$
$∴ x = \frac{y}{4} = 5$ which is satisfied by $C_{3} H_{8}$ (Propane)

Q. 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 :

Ethane

Propane

Butane

Isobutane

Combustion of Hydrocarbon: Cx​Hy​+(X+4y​)O2​→XCO2​+2y​H2​O 1:(X+4y​) ∴x=4y​=5 which is satisfied by C3​H8​ (Propane)

Combustion of Hydrocarbon:
$C_{x} H_{y} + (X + \frac{y}{4}) O_{2} \to X C O_{2} + \frac{y}{2} H_{2} O$
$1 : (X + \frac{y}{4})$
$∴ x = \frac{y}{4} = 5$ which is satisfied by $C_{3} H_{8}$ (Propane)