Combustion and Chemical Reactions

Andrew from the Utah Science Technology and Research Initiative explains combustion, a chemical reaction involving fuel and oxygen that produces energy, CO2, and water. He discusses fossil fuels like coal, petroleum, and natural gas, which are hydrocarbons. An experiment with a candle demonstrates how combustion creates heat and pressure, leading to a vacuum effect. The video concludes with observations and encourages viewers to explore more resources on their website.

What is the term used for the chemicals you start with in a chemical reaction?

• Inhibitors

• Catalysts

• Reactants

• Products

In a combustion reaction, what are the main products formed?

• Nitrogen and methane

• Sulfur dioxide and nitrogen

• Carbon dioxide and water

• Oxygen and hydrogen

What is the role of oxygen in the combustion process?

• It acts as a fuel

• It is a product of combustion

• It is a reactant that combines with fuel

• It cools down the reaction

Which of the following is a result of a combustion reaction?

• Release of energy

• Absorption of energy

• Formation of hydrocarbons

• Decrease in temperature

Which of the following is NOT a fossil fuel?

• Natural gas

• Petroleum

• Coal

• Hydrogen

What elements make up hydrocarbons?

• Oxygen and sulfur

• Carbon and hydrogen

• Hydrogen and oxygen

• Carbon and nitrogen

What is needed to start the combustion reaction in the candle demonstration?

• Water

• A glass

• A match

• Food coloring

What happens to the air inside the glass when the candle is lit?

• It contracts

• It cools down

• It expands

• It disappears

What causes the water to be sucked into the glass during the demonstration?

• The expansion of air

• The contraction of air

• The heat from the candle

• The presence of food coloring

What happens to the flame when all the oxygen is used up in the glass?

• It splits into two

• It changes color

• It goes out

• It burns brighter