CNG is an important transportation fuel. When 100 g CNG is mixed with 208 g oxygen in vehicles, it leads to the formation of and and produces large quantity of heat during this combustion, then the amount of carbon dioxide, produced in grams is ______. [nearest integer]
[Assume CNG to be methane]
[Assume CNG to be methane]
Answer: 143
Solution
The combustion reaction is: .
Moles of CH₄ = 100/16 = 6.25 mol
Moles of O₂ = 208/32 = 6.5 mol
From stoichiometry, 1 mol CH₄ requires 2 mol O₂. For 6.25 mol CH₄, we need 12.5 mol O₂. Since only 6.5 mol O₂ is available, O₂ is the limiting reagent.
From the equation: 2 mol O₂ produces 1 mol CO₂
So, 6.5 mol O₂ produces 6.5/2 = 3.25 mol CO₂
Mass of CO₂ = 3.25 × 44 = 143 g
Moles of CH₄ = 100/16 = 6.25 mol
Moles of O₂ = 208/32 = 6.5 mol
From stoichiometry, 1 mol CH₄ requires 2 mol O₂. For 6.25 mol CH₄, we need 12.5 mol O₂. Since only 6.5 mol O₂ is available, O₂ is the limiting reagent.
From the equation: 2 mol O₂ produces 1 mol CO₂
So, 6.5 mol O₂ produces 6.5/2 = 3.25 mol CO₂
Mass of CO₂ = 3.25 × 44 = 143 g
JEE Main · 2022 · 26 Jun 2022 · Shift 2 · Integer answer