7-1 WG Part 4 CB Rnxs w/ Notes

Multiple Choice

What are the two REACTANTS of a Combustion reaction?

• Oxygen and Carbon Dioxide

• A Fuel and Oxygen

• Carbon Dioxide and Water Vapor

• A Fuel and Carbon Dioxide

Multiple Choice

What are the PRODUCT(S) of a combustion reaction

(assume there is plenty of oxygen available)?

• Carbon Dioxide

• Carbon & Oxygen

• Carbon Dioxide & Water Vapor

• Liquid water

• Hydrogen & Carbon

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Multiple Choice

The flame will only be visible

• while atoms are rearranging.

• as long as the candle is hot

• if all of the oxygen has been turned into CO₂ and H₂O

• as long as wax is present

Multiple Choice

Which of the following are sources of energy that can be used to initiate (start) a combustion reaction?

• All of the above

Multiple Choice

The initial input of energy is used to start the reaction by:

• rearranging atoms into new products

• breaking bonds and separating atoms in the fuel and nearby oxygen

• storing some energy in the bonds of the new products

• creating new oxygen atoms

Multiple Choice

The "Fire Triangle" includes the three requirements for a fire to continue to burn. Which component will be removed when the person lowers the "candle snuffer" down over the flame?

• Fuel in the form of candle wax

• Heat

• Oxygen

• None of the above

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Multiple Choice

This glass slide is turning black because:

• Carbon Monoxide molecules are collecting on it.

• Carbon Dioxide molecules are collecting on it.

• Individual Carbon atoms (soot) is collecting on it.

• A hydrocarbon is collecting on it.

Multiple Choice

The black smoke is a sign that there is:

• PLENTY of oxygen atoms available for the fuel to react with

• NOT ENOUGH oxygen atoms available for the fuel to react with

Fill in the Blanks

Labelling

Label the Orange and Black Smoke with information about its temperature and composition.

Drag labels to their correct position on the image

VERY HOT Single C atoms

COOLER Single C atoms

Categorize

Options (14)

Abundance (plenty) of Oxygen around

Blue Flame

Products are CO₂ and H₂O

NOT enough Oxygen present

Some Carbon atoms can't form CO₂ due to lack of Oxygen

Yellow/Orange Flame

Smoke and Soot present

Clean - No smoke or soot

"Dirty Flame"

Carbon Monoxide is formed

Products are two colorless, clean gases

Consider the differences between COMPLETE and INCOMPLETE Combustion reactions and move the tiles under the correct header.

COMPLETE COMBUSTION

INCOMPLETE COMBUSTION

Multiple Select

Select ALL images that indicate there is an abundance of oxygen surrounding the fuel.

Multiple Select

Select ALL images that indicate an INCOMPLETE COMBUSTION reaction is happening.

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Multiple Choice

The VERY FIRST thing you should do if your Carbon Monoxide alarm starts beeping is:

• call 911 from inside the house

• search for the source of the CO leak

• try to reset the CO alarm and see if it beeps again

• move outside into fresh air

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Multiple Choice

This is a problem because:

• The car will take longer than usual to warm up.

• Carbon monoxide could back up inside the car.

• The water vapor produced during the combustion reaction will freeze instantly.

• Gasoline is wasted.