Answer to Question #121931 in General Chemistry for qingyu li

Question

Liquid octane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 6.85 g of octane is mixed with 9.8 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Round your answer to 2 significant digits.

Answer 1

2C₈H₁₈+25O₂=16CO₂+18H₂O

1. We can calculate how much CO₂ is formed by C₈H₁₈ and by O₂

• Based on the above reaction, 114 g of C₈H₁₈ to 704 g of CO₂ are formed. We calculate how much CO₂ is formed from 6.85 g of C₈H₁₈ 6.85*704/114=42.3gr CO₂
• Based on the above reaction, 800 g of O₂ to 704 g of CO₂ are formed. We calculate how much CO₂ is formed from 9.8 g of O₂ 9.8*704/800=8.624gr CO₂

2.As a final result we get the result calculated on O₂ (8.624gr). because when all O₂ is consumed, CO₂ increases.

if we get the result calculated for CO₂ (42.3gr), O₂ is not enough for all the CO₂ to be consumed. so we do not get this result. and we have the final answer 8.624gr