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John Candle Experiment Answer

Candle (C25 H52) + Oxygen -> CO2 + H20

John Ng

Teacher| Religious Education Director

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Aran, Chrissy, Sarah, Dan

Hydrocarbon (wax) + O2 --> H2O + CO2 + energy

We don't know why the higher candle goes out first!

Candle experiment- Alex

The heat makes the C02 molecules rise faster therefore the oxygen is being pushed down.

Sent from my iPad

Melanie

Theories:

Because water vapor rises to the top, it extinguishes the top flame first by displacing the oxygen, which then becomes more accessible for the shorter candle.

Fire produces water, but water puts out fire!

Candle - Rachel's group

Candle + O2 -> H2O + CO2 + delta H

H2O + CO2 gases are warm and stay near the top at first, putting out taller candles, but CO2 is heavier than O2 and N2 and H2O so eventually settles downwards putting out the lower candle.

Ryan, Colin, Erin, Kate, Rachel

Grace

more oxygen lower to the ground. So the higher candle burns out faster. The shorter candle lasts longer after the other candle burns out because it now has more O2

--
Kathy Nichols
Language Arts/Social Studies
Pleasanton Middle School

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