Understanding Candle Combustion

Mr. Andersen explains the science behind candles, focusing on the combustion process. He describes the parts of a candle, emphasizing that the paraffin wax, when heated, turns into a gas that burns. He demonstrates how relighting smoke works and explains the trick behind self-relighting candles. The video also covers the conservation of mass during burning, where the mass is converted into carbon dioxide and water. The energy released during combustion is discussed, highlighting the redox reaction. Finally, the video explores why candles have a pointed shape and how they behave in space.

What are the two main components of a candle?

• Flame and smoke

• Carbon and hydrogen

• Paraffin and oxygen

• Wax and wick

What is paraffin primarily composed of?

• Oxygen and nitrogen

• Carbon and oxygen

• Carbon and hydrogen

• Hydrogen and nitrogen

What state of paraffin is actually burning in a candle?

• Gas

• Liquid

• Plasma

• Solid

How can you relight a candle after blowing it out?

• By igniting the wax

• By lighting the wick directly

• By using a new match

• By relighting the smoke

What keeps trick candles relighting after being blown out?

• A unique wick design

• A metal that stays hot

• A special type of wax

• A chemical coating

What happens to the mass of a candle as it burns?

• It decreases

• It remains the same

• It increases

• It fluctuates

Into what substances is the mass of a burning candle converted?

• Carbon monoxide and water

• Carbon dioxide and water

• Heat and light

• Oxygen and hydrogen

What is the source of energy released during candle combustion?

• The bonds between carbon and hydrogen

• The heat from the flame

• The wick burning

• The light emitted

Why is a candle flame pointy at the top?

• Due to the shape of the wick

• Due to the color of the flame

• Because heated gas rises

• Because of the wax melting

What shape would a candle flame take in a space shuttle?

• Flat

• Irregular

• Pointy

• Spherical