Balancing Combustion Reactions

The video tutorial explains how to balance combustion reactions using the CHO method, focusing on carbon, hydrogen, and oxygen. It provides detailed examples with methane, butane, and ethanol, highlighting common challenges like fractional oxygen molecules and how to resolve them by adjusting the entire equation.

What is the correct order to balance elements in a combustion reaction using the CHO method?

• Carbon, Hydrogen, Oxygen

• Carbon, Oxygen, Hydrogen

• Oxygen, Carbon, Hydrogen

• Hydrogen, Oxygen, Carbon

Which element is balanced first in the CHO method for combustion reactions?

• Carbon

• Hydrogen

• Nitrogen

• Oxygen

In the combustion of methane, what is the balanced equation for the number of water molecules?

• 1 water molecule

• 2 water molecules

• 4 water molecules

• 3 water molecules

When balancing the combustion of butane, how many carbon dioxide molecules are needed to balance the carbons?

• 4 carbon dioxide molecules

• 2 carbon dioxide molecules

• 5 carbon dioxide molecules

• 3 carbon dioxide molecules

How do you handle fractional oxygen molecules when balancing combustion reactions?

• Ignore the fraction

• Use a different method

• Add more fuel

• Multiply the entire equation by two

In the final balanced equation for butane combustion, how many water molecules are there?

• 5 water molecules

• 8 water molecules

• 12 water molecules

• 10 water molecules

What is the formula for ethanol used in combustion reactions?

• C2H6O

• C2H4O

• C2H5OH

• C3H8O

How many water molecules are needed to balance the hydrogens in the combustion of ethanol?

• 4 water molecules

• 3 water molecules

• 2 water molecules

• 5 water molecules

In the combustion of ethanol, how many oxygen molecules are required to balance the equation?

• 2 oxygen molecules

• 3 oxygen molecules

• 4 oxygen molecules

• 5 oxygen molecules

What is the total number of oxygen atoms needed on the right side of the ethanol combustion equation?

• 5 oxygen atoms

• 6 oxygen atoms

• 7 oxygen atoms

• 8 oxygen atoms