FLASHCARD 2.4 Burning Organic Molecules

Front

What types of molecules are in fossil fuels and why do they burn?

Back

Fossil fuels contain organic molecules, which burn because they react with oxygen to release energy.

Front

What happens to one molecule of methane (CH₄) gas as it is burned with oxygen (O₂)?

Back

It combines with two molecules of oxygen to form carbon dioxide and water.

Front

This model shows methane being burned. What molecules were made after methane burned?

Back

Carbon dioxide and water

Front

This model shows methane being burned. What happens to the hydrogen atoms that were in methane as it is burned?

Back

They combine with oxygen to form water.

Front

This model shows a molecule of octane. Assuming there are plenty of oxygen atoms around, how many molecules of carbon dioxide (CO₂) could one octane molecule help make if it were burned?

Back

8

Front

Cars burn gasoline to run. Where do the gasoline atoms go when a car's gasoline has all been used up?

Back

The gasoline molecules rearrange into different molecules and go into the air.

Front

This model shows methane combusting (being burned). According to the model, what molecules are made after methane burns?

Back

Carbon dioxide (CO₂) and water (H₂O)

Front

This is an energy conservation diagram showing the combustion (burning) of the organic molecule octane. Which of the following would NOT be a reasonable choice for the energy indicators labeled A-F on this model? Options: B = Temp. of air, E = Light of reaction, A = Chemical reaction of octane, D = Mass of octane

Back

D = Mass of octane