VCE Chemistry Carbon Based Fuels 2

What is a combustion reaction?

• A combustion reaction is a chemical reaction that occurs between a fuel and an oxidizing agent, typically producing heat and light.

• A combustion reaction is a chemical reaction that occurs between a fuel and a reducing agent, typically producing heat and light.

• A combustion reaction is a chemical reaction that occurs between two fuels, typically producing heat and light.

• A combustion reaction is a chemical reaction that occurs between an oxidizing agent and a reducing agent, typically producing heat and light.

What is the general equation for the combustion of a hydrocarbon?

• hydrocarbon + oxygen -> carbon monoxide + water

• hydrocarbon + oxygen -> carbon dioxide + hydrogen

• hydrocarbon + oxygen -> carbon + water

• hydrocarbon + oxygen -> carbon dioxide + water

What is a limiting reagent?

• A reagent that is left over after a chemical reaction

• A limiting reagent is a reactant that is completely consumed in a chemical reaction, limiting the amount of product that can be formed.

• A reagent that speeds up a chemical reaction

• A reagent that is added to a chemical reaction after it has started

What is an excess reagent?

• An excess reagent is a reactant that is present in a smaller quantity than necessary for a chemical reaction to occur.

• An excess reagent is a reactant that is present in a greater quantity than necessary for a chemical reaction to occur.

• An excess reagent is a reactant that is completely consumed in a chemical reaction.

• An excess reagent is a product that is formed in a chemical reaction.

How can you determine the limiting reagent in a combustion reaction?

• Calculate the molar mass of each reactant

• Determine the volume of each reactant

• Observe the color change during the reaction

• Compare the stoichiometric ratios of the reactants

C₅H₁₂ + 8O₂ --> (a)   CO₂ + 6H₂O

For the complete combustion of butane

2C₄H₁₀ + 13O₂ --> 8CO₂ + (a)   H₂O

For the incomplete combustion of propene

C₃H₆ + (a)   O₂ --> 3CO + 3H₂O

What do we use limewater to test for?

• Carbon dioxide
• Water
• Heat
• Smoke

Which of these problems can be caused by air pollution?

• Respiratory problems
• Reduced food sources for humans
• Increased disease for humans
• Decrease in global temperatures