Answer to Question #152027 in Chemistry for lilly

Question

Gas barbecues burn propane using oxygen from the air. If 5.00 L of propane is burned, predict the volume of oxygen, at the same temperature and pressure, required for complete combustion.

Answer 1

Solution:

Propane (C₃H₈).

The balanced chemical equation:

C₃H₈ + 5O₂ = 3CO₂ + 4H₂O

According to the equation: n(C₃H₈) = n(O₂)/5

n(gas) = V(gas) / V_m

Hence,

V(C₃H₈)/V_m = V(O₂)/5V_m

V(C₃H₈) = V(O₂)/5

V(O₂) = 5 × V(C3H8) = 5 × 5.00 L = 25.00 L

V(O₂) = 25.00 L

Answer: 25.00 L O₂