Balancing Combustion Reactions

The video tutorial explains how to balance a combustion reaction equation involving CH3CH3 and O2, resulting in carbon dioxide and water. It covers the process of balancing carbon, hydrogen, and oxygen atoms, using coefficients and fractions to achieve a balanced equation. The tutorial also discusses converting fractional coefficients to whole numbers for a complete and balanced chemical equation.

What are the products of the combustion reaction involving CH3CH3 and O2?

• Methane and water

• Carbon monoxide and water

• Carbon dioxide and water

• Oxygen and hydrogen

How can CH3CH3 be alternatively represented to simplify balancing?

• C2H4

• C2H6

• CH4

• C3H8

What is the first step in balancing the given combustion equation?

• Balance the entire equation at once

• Balance the carbon atoms

• Balance the hydrogen atoms

• Balance the oxygen atoms

After balancing the carbon atoms, how many oxygen atoms are initially present on the product side?

• Six

• Five

• Four

• Three

What coefficient is used in front of H2O to balance the hydrogen atoms?

• Four

• Three

• Two

• Five

What fraction is used to balance the oxygen atoms in the equation?

• 7/2

• 3/2

• 5/2

• 9/2

Why might some teachers prefer whole number coefficients in a balanced equation?

• It is easier to read

• It is a standard practice

• It simplifies calculations

• It is more accurate

What is the final coefficient for O2 when the equation is balanced with whole numbers?

• Four

• Six

• Seven

• Five

What is the key strategy mentioned for balancing combustion reactions?

• Balance oxygen first

• Use fractions for oxygen

• Ignore carbon

• Start with hydrogen

What are the final coefficients for the balanced equation?

• 1, 3, 2, 4

• 2, 7, 4, 6

• 3, 5, 6, 8

• 4, 9, 8, 10