Table of Contents
- 1 When you pour the carbon dioxide gas onto the candles why do they go out one by one?
- 2 How do the absence of oxygen affects the lighted candle?
- 3 What happens when you put a cup over a candle?
- 4 Why will the candle keep burning in the situation?
- 5 Why does the pressure decrease when a candle goes out?
When you pour the carbon dioxide gas onto the candles why do they go out one by one?
When the carbon dioxide displaces the air, the candle doesn’t have enough oxygen, so it goes out.
Why do you think the lighted candle in the smaller jar put off first than the larger ones?
Which candle goes out first? The candle that is the shortest will go out first. It is because the CO2 is denser than air so it will settle down at the bottom eventually putting off the fire.
Why does a candle burn more rapidly when placed in an open jar than in air?
Putting the jar over the candle keeps oxygen from outside the jar from getting in. So, when that oxygen is used up, the reaction can’t keep going. Running out of oxygen makes the flame go out.
How do the absence of oxygen affects the lighted candle?
When the oxygen is depleted, the candle goes out and the air cools. The volume of the air decreases and the water rises. The temporary temperature change delays the rise of the water.
Where does all the wax go when a candle burns?
When candles burn, most of their matter goes into the air. The light and heat from a candle comes from the wax burning. When you light the wick, the flame causes some of the wax to melt, flow up the wick and evaporate, and then the wax vapor burns.
What happens when you pour water on a burning candle?
When water is added to the wax, two things happen. Firstly, the water — being denser than wax — sinks to the bottom of the container. Secondly, as burning wax quickly reaches a temperature of well over 200 degrees C, the water instantly vapourises.
What happens when you put a cup over a candle?
What happens if you cover a lit candle in a water basin with a glass? The burning candle produces carbon dioxide and water in the form of water vapor. The glass becomes foggy due to this water. The flame goes out, of course, from a lack of enough oxygen in the glass.
Does the size of an inverted jar affect the amount of time it takes for the candle to burn out?
A candle will burn longer in a larger bottle because it contains more oxygen. The height to which the water rises varies with the shape of the jar or bottle.
What would be needed for the candle to light up?
For a candle to burn, a heat source (commonly a naked flame from a match or lighter) is used to light the candle’s wick, which melts and vaporizes a small amount of fuel (the wax). Once vaporized, the fuel combines with oxygen in the atmosphere to ignite and form a constant flame.
Why will the candle keep burning in the situation?
A lit candle needs to draw oxygen from the air in order to continue burning. If you limit the amount of air available, the candle’s flame eventually goes out once it uses up all the oxygen.
Why does a candle go out when you put a jar over it?
Putting the jar over the candle keeps oxygen from outside the jar from getting in. The reaction can only use the oxygen that is already in the jar. So, when that oxygen is used up, the reaction can’t keep going. Running out of oxygen makes the flame go out.
Why does the water rise after the candle is dimmed?
No bubbles can be seen. Argument: It can not be that the oxygen depletion is responsible for the water raising, because the water does not rise immediately. The water rises only after the candle dims.
Why does the pressure decrease when a candle goes out?
In other words, the cup covers a volume of less dense air because the air is heated around the candle. When the air cools after the candle goes out, the pressure decreases almost entirely from less dense air cooling.
What happens to carbon dioxide and water when you burn a candle?
When we ignite the candle, the hydrocarbon reacts with oxygen (in excess) to produce carbon dioxide and water. The burning sets an air current which gives dome shape to candle flame and it helps to get complete combustion at the bottom and the outer surface of the flame.