Question

When ethane (C2H6) burns, it produces carbon dioxide and water:

Answer 1

Answer:

179 L

Explanation:

We are given;

The equation for the combustion of ethane.;

2C₂H₆(g)+7O₂g)→4CO₂(g)+6H₂O(l)

Volume of ethane gas used as 89.5 L

We are required to determine the volume of carbon dioxide produced;

Step 1: Determine the number of moles of ethane gas

According to the molar gas volume, 1 mole of a gas occupies a volume of 22.4 L at STP.

Therefore;

Number of moles of ethane = Volume given/molar gas volume

Thus;

Moles of ethane = 89.5 L ÷ 22.4 L

                           = 3.9955

                          = 4.0 moles

Step 2: Determine the number of moles of CO₂ produced

From the equation,

12 moles of ethane reacts to produce 4 moles of carbon dioxide

Thus; Moles of CO₂ = Moles of ethane × 2

                                = 4.0 moles × 2

                                = 8.0 moles

Step 3: Volume of CO₂ produced

We know that;

1 mole of a gas = 22.4 L at STP

Therefore;

Volume of CO₂ = 8.0 moles × 22.4 L/mol

                         = 179.2 L

                         = 179 L

Therefore, the volume of CO₂ is 179 L