Balancing Combustion Reactions

The video tutorial explains how to write and balance the chemical equation for the complete combustion of a hydrocarbon, specifically nonane (C9H20). It introduces hydrocarbons as compounds made of hydrogen and carbon, and describes combustion as a reaction with oxygen gas. The tutorial details the products of complete combustion, which are carbon dioxide and water. It provides a step-by-step guide to balancing the reaction, starting with carbon, followed by hydrogen, and finally oxygen, resulting in the balanced equation: C9H20 + 14O2 → 9CO2 + 10H2O.

What are hydrocarbons primarily composed of?

• Carbon and Hydrogen

• Hydrogen and Oxygen

• Oxygen and Nitrogen

• Carbon and Nitrogen

What is the main characteristic of a combustion reaction?

• Reaction with water

• Reaction with nitrogen gas

• Reaction with oxygen gas

• Reaction with carbon dioxide

What are the products of complete combustion of hydrocarbons?

• Nitrogen and water

• Oxygen and hydrogen

• Carbon dioxide and water

• Carbon monoxide and water

Which hydrocarbon is being combusted in the given reaction?

• C8H18

• C9H20

• C10H22

• C7H16

What is the first element to balance in the combustion reaction?

• Nitrogen

• Carbon

• Hydrogen

• Oxygen

How many carbon atoms are on the left side of the equation before balancing?

• 10

• 9

• 8

• 6

What coefficient is used to balance hydrogen in the reaction?

• 9

• 10

• 8

• 11

How many oxygen molecules are needed to balance the equation?

• 14

• 16

• 12

• 18

What is the final balanced equation for the combustion of C9H20?

• C9H20 + 16O2 → 9CO2 + 10H2O

• C9H20 + 12O2 → 9CO2 + 10H2O

• C9H20 + 18O2 → 9CO2 + 10H2O

• C9H20 + 14O2 → 9CO2 + 10H2O

What is the total number of oxygen atoms on the right side of the balanced equation?

• 24

• 26

• 28

• 30