Question

Give the theoretical yield, in moles, of CO2 from the reaction of 3.00 moles of C3H18 with 3.00 moles of O2

Answer 1

1.8 moles of CO₂

Step-by-step explanation:

The equation for the combustion of propane is given by;

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

We are given;

• Moles of C₃H₈ = 3 moles
• Moles of O₂ = 3 moles

We are required to determine the theoretical number of moles of CO₂ produced.

• From the equation, 1 mole of C₃H₈ reacts with 5 moles of O₂
• We are given, 3 moles of O₂ and 3 moles of C₃H₈, thus, oxygen is the limiting reactant since it has a higher ratio.
• Therefore, using mole ratio we can determine the number of moles of CO₂ produced.

Mole ratio of O₂ to CO₂ is 5 : 3

Thus, moles of CO₂ = moles of O₂ × 3/5

= 3 moles × 3/5

= 1.8 moles

Hence, the theoretical number of moles of CO₂ from the reaction is 1.8 moles