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candles made of paraffin contain cabon and hydrogen. As it burns, they combine with oxygen to form water and carbon dioxide. . So yes, yes they do :)
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∙ 13y ago
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Is a burning candle a reversible or non reversible change?
Non reversible, after the wick has been burned, it is impossible to reverse the effects of the change.
Is burning a candle wick a chemical change?
Candle wax burning is a chemical change. During the process of burning, the wax undergoes a chemical reaction with oxygen from the air, resulting in the formation of new substances and the release of energy in the form of heat and light. This to due to the fact that candle waxes is a hydrocarbon compound , namely, it is the paraffin wax. Therefore, to be more specific, the combustion equation can be written as follows: Paraffin Wax (C25H52) + Oxygen (O2) → Carbon Dioxide (CO2) + Water Vapor (H2O) If you wish to learn more about candles, please check out ohcans candles. We have blogs dedicated to candle making.
What is the chemical reaction when you burn a candle?
When a candle burns the reactions that occur are both chemical and physical. Chemical reaction is when substances are mixed together to create a different material. A physical reaction is when there is a change in the appearance of the substance. For example when water turns to ice, and when chocolate melts. The chemical reaction that happens when a candle burns is when the oxygen combines with the paraffin. When this happens, this makes carbon dioxide, water and other materials. When the wax reacts with the oxygen it gives off light and heat. The more oxygen that reacts with the candle when it burns, the brighter and hotter it is. The physical reaction that occurs is when the candle wax melts. When the energy (light and heat) inside of the candle is released it helps to melt the candle.
Why burning of candle is a physical and chemical change?
CHEMICAL
Is a candle melting a physical change or a chemical change?
It is a physical change because when it melts it is still a candle just a melted one
when a candle is lit it undergoes a chemical change?
That is correct, a candle (or the material of which it is composed, which is usually paraffin) undergoes a chemical change when it burns.
Is candle burning a reversible change prove it?
Not reversable, If you put a burned candle in a cold dark place, it does not become whole again.
True or false The candle wax has undergone a chemical change?
False because the wax would have gone through a physical change since it has only melted and turned into liquid but you can reverse the effect by cooling it so it becomes a solid again. (No new substance formed) When the string is burned by the fire, the change is irreversible. Also, when the string is burned, new substances are created like gases and ash making it a chemical change. Since no new substance forms when the candle wax melts, that's why it is a physical change, not a chemical change.
Is it physical or chemical change a candle wax falls on the ground and cools?
Cooling, and changing from a liquid to a solid are physical changes, not chemical changes. The chemical composition of the paraffin does not change.
Is a burning candle a reversible or non reversible change?
Non reversible, after the wick has been burned, it is impossible to reverse the effects of the change.
Is burning a candle wick a chemical change?
Candle wax burning is a chemical change. During the process of burning, the wax undergoes a chemical reaction with oxygen from the air, resulting in the formation of new substances and the release of energy in the form of heat and light. This to due to the fact that candle waxes is a hydrocarbon compound , namely, it is the paraffin wax. Therefore, to be more specific, the combustion equation can be written as follows: Paraffin Wax (C25H52) + Oxygen (O2) → Carbon Dioxide (CO2) + Water Vapor (H2O) If you wish to learn more about candles, please check out ohcans candles. We have blogs dedicated to candle making.
What is the chemical reaction when you burn a candle?
When a candle burns the reactions that occur are both chemical and physical. Chemical reaction is when substances are mixed together to create a different material. A physical reaction is when there is a change in the appearance of the substance. For example when water turns to ice, and when chocolate melts. The chemical reaction that happens when a candle burns is when the oxygen combines with the paraffin. When this happens, this makes carbon dioxide, water and other materials. When the wax reacts with the oxygen it gives off light and heat. The more oxygen that reacts with the candle when it burns, the brighter and hotter it is. The physical reaction that occurs is when the candle wax melts. When the energy (light and heat) inside of the candle is released it helps to melt the candle.
Is burning an irreversible change that produces no new substances?
No. Burning is sometimes a reversible change, as when hydrogen is burned, and it always produces a new compound(s).
Is the melting paraffin physical or chemical change?
physical change
Does paraffin undergo a physical change?
Yes
How does a candle disappear totally when burned?
Definitely it will disappear if the wax used to make the candle is pure and it burned properly like putting the candle in some container or something like that. What I mean is if the flame completely utilizes the content of the candle then the mass will definitely disappear. If you want you can put the wax of unburned in a container and then put a good thread in it and burn. Of course above all the candle should not contain any impurities. Hope this explains.
Why is melting of covered candle a physical change while burning of a candle wick a chemical change?
This is because a candle will change its whole form and stay that way, which is a physical outer change. And a candle wick only burns, it doesn't change it's appearance.
