Balancing Ethanol Combustion Reactions

The video tutorial explains the process of balancing a combustion reaction involving ethanol (C2H5OH) and oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). It begins by introducing ethanol as an alcohol and describes the combustion reaction. The tutorial then guides viewers through counting and balancing the atoms on both sides of the equation, focusing on carbon, hydrogen, and oxygen atoms. Adjustments are made to balance the equation, particularly the oxygen atoms, to achieve a balanced chemical equation. The video concludes with a balanced equation and a brief summary by Dr. B.

What type of reaction occurs when ethanol reacts with oxygen?

• Combustion

• Decomposition

• Synthesis

• Single Replacement

What is the chemical formula for ethanol?

• C2H6

• C2H5OH

• C3H7OH

• CH3OH

How many hydrogen atoms are present in ethanol?

• 4

• 5

• 6

• 7

What is the total number of oxygen atoms on the reactant side before balancing?

• 4

• 1

• 2

• 3

What is the first step in balancing the hydrogen atoms in the equation?

• Add a coefficient of 3 in front of H2O

• Add a coefficient of 2 in front of CO2

• Add a coefficient of 3 in front of CO2

• Add a coefficient of 2 in front of H2O

What is the result of placing a coefficient of 2 in front of CO2?

• Balances oxygen atoms

• Balances hydrogen atoms

• Balances nitrogen atoms

• Balances carbon atoms

What is the total number of oxygen atoms needed on the product side to balance the equation?

• 5

• 6

• 7

• 8

What coefficient is placed in front of O2 to balance the oxygen atoms?

• 5

• 4

• 3

• 2

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

• C2H5OH + O2 → CO2 + H2O

• C2H5OH + 3O2 → 2CO2 + 2H2O

• C2H5OH + 3O2 → 2CO2 + 3H2O

• C2H5OH + 2O2 → 2CO2 + 3H2O

What is the main challenge in balancing the combustion equation of ethanol?

• Balancing hydrogen atoms

• Balancing oxygen atoms

• Balancing carbon atoms

• Balancing nitrogen atoms