Combustion

• What should you be able to describe by the end of the video on hydrocarbons?

  How hydrocarbons can be used as fuels
• What is the significance of balancing equations for the complete combustion of hydrocarbons?

  It ensures that the number of atoms of each element is conserved in the reaction
• What happens to the flammability and boiling points of hydrocarbons as the size of the molecule increases?

  They become less flammable and the boiling point increases
• What is the relationship between the size of hydrocarbon molecules and their viscosity?

  Larger hydrocarbon molecules tend to have a higher viscosity and flow more slowly
• What are some examples of vehicles that run on hydrocarbon fuels?

  • Ships
  • Planes
  • Cars
• What do hydrocarbon fuels release when they are combusted?

  Energy
• What does the term "combustion" refer to in the context of hydrocarbons?

  It refers to the burning of hydrocarbons
• What are the products of complete combustion when oxygen is unlimited?

  Carbon dioxide and water
• What should you be able to describe by the end of the video on hydrocarbons?

  How hydrocarbons can be used as fuels
• What is the second objective of the video regarding hydrocarbons?

  To write balanced equations for the complete combustion of hydrocarbons
• What is the equation for the complete combustion of methane?

  CH₄ + 2O₂ → CO₂ + 2H₂O
• How do the properties of hydrocarbons depend on the size of the molecule?

  Short chain hydrocarbons are highly flammable and have low boiling points, while larger hydrocarbons are less flammable and have higher boiling points
• What happens to the viscosity of hydrocarbons as the chain length increases?

  Longer chain hydrocarbons have a higher viscosity and tend to flow more slowly
• What are some examples of vehicles that run on hydrocarbon fuels?

  • Ships
  • Planes
  • Cars
• How do you balance the carbon atoms in the combustion of methane?

  By ensuring there is one carbon atom in both methane and carbon dioxide
• What is a key fact about hydrocarbon fuels when they are combusted?

  Hydrocarbon fuels release energy when they are combusted
• What does the term "combustion" refer to in the context of hydrocarbons?

  Combustion refers to the burning of hydrocarbons
• What are the products of complete combustion when oxygen is unlimited?

  Carbon dioxide and water
• How do you balance the hydrogen atoms in the combustion of methane?

  By placing a large 2 in front of the water to have four hydrogen atoms on the right side
• What is the equation for the complete combustion of methane?

  CH₄ + 2O₂ → CO₂ + 2H₂O
• How do you balance the carbon atoms in the combustion of methane?

  By ensuring there is one carbon atom in both methane and carbon dioxide
• How do you balance the hydrogen atoms in the combustion of methane?

  By placing a large 2 in front of the water to get four hydrogen atoms
• How do you balance the oxygen atoms in the combustion of methane?

  By placing a large 2 in front of O₂ to have four oxygen atoms on the left side
• How do you balance the oxygen atoms in the combustion of methane?

  By placing a large 2 in front of O₂ to get four oxygen atoms on the left side
• What is the process to balance the combustion equation for a hydrocarbon?

  1. Balance carbon atoms first.
  2. Balance hydrogen atoms next.
  3. Balance oxygen atoms last.
• What is the process to balance the combustion equation for a hydrocarbon?

  1. Balance carbon atoms first.
  2. Balance hydrogen atoms next.
  3. Balance oxygen atoms last.
• What should you do to balance the equation: C₃H₈ + O₂ → CO₂ + H₂O?

  Place a large 3 in front of CO₂ and a large 4 in front of H₂O
• How do you determine the total number of oxygen atoms needed on the left side of the equation?

  By adding the oxygen atoms from CO₂ and H₂O on the right side
• What is the total number of oxygen atoms produced in the combustion of C₃H₈?

  10 oxygen atoms
• What should you do to practice balancing combustion equations?

  Refer to the vision workbook for questions on combustion
• What is the final step in balancing the combustion equation?

  To ensure all carbon, hydrogen, and oxygen atoms are balanced
• Where can you find more questions on combustion?

  • In the vision workbook
  • By clicking on the provided link in the video