Answer to Question #288467 in General Chemistry for yane

Question

1. How many liters of O_{2 (g)} at STP is needed to completely burn 20.0 L of butane (C₄H₁₀), with this reaction?

2 C₄H_{10 (g)} + 13 O_{2 (g)} → 8 CO_{2 (g)}  + 10 H₂O _(l)

Answer 1

The mole ratio of butane to oxygen is 2:13. For gases, this is also the volume ratio.

Therefore, the volume of oxygen= 20/2 x 13 = 130 liters.