Question

The combustion of ethane (C2H6) produces carbon dioxide and steam. 2C2H6(g)+7O2(g)⟶4CO2(g)+6H2O(g) How many moles of CO2 are produced when 5.60 mol of ethane is burned in an excess of oxygen?

Answer 1

Answer: 11.2 moles of $CO_2$ are produced when 5.60 mol of ethane is burned in an excess of oxygen.

Explanation:

The combustion of ethane is represented using balanced chemical equation:

$2C_2H_6(g)+7O_2(g)\rightarrow 4CO_2(g)+6H_2O(g)$

As oxygen is preset in excess, ethane acts as the limiting reagent as it limits the formation of product.

According to stoichiometry :

2 moles of propane produces 4 moles of carbon dioxide

Thus 5.60 moles of propane will produce=$\frac{4}{2}\times 5.60=11.2$ moles of carbon dioxide

Thus 11.2 moles of $CO_2$ are produced when 5.60 mol of ethane is burned in an excess of oxygen.