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When a candle is burned, the paraffin wax is heated and undergoes a chemical reaction with oxygen from the air, resulting in combustion. The paraffin wax is broken down into smaller molecules like carbon dioxide and water vapor, releasing energy in the form of heat and light. The process is a physical and chemical change.
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Is burning a candle wick a chemical change?
Yes, burning a candle wick is a chemical change. During the burning process, the wax in the candle undergoes combustion, transforming into new substances such as carbon dioxide, water vapor, and other byproducts.
Is a burning candle a reversible or non reversible change?
Burning a candle is a non-reversible change because once the wax is melted and the wick is burnt, it cannot be undone to return the candle to its original state. The chemical composition of the wax and wick is changed permanently.
What is burning candle it is physically Chang or chamically?
Burning a candle involves a chemical change, as the wax is being oxidized by the oxygen in the air to produce heat, light, carbon dioxide, and water vapor. This process is irreversible and results in the formation of new substances, which is characteristic of a chemical change.
Is soot formed as a candle burns a chemical change?
Yes, soot formation when a candle burns is considered a chemical change. This is because the wax molecules in the candle undergo a chemical reaction with oxygen in the air, resulting in the formation of new substances like carbon dioxide, water vapor, and soot particles.
Is candle wax melting chemical or physical change?
The melting of candle wax is a physical change because it is a reversible process where the wax changes from a solid to a liquid state without forming new substances.
The substances in paraffin do not chage when a candle burns?
When a candle burns, the paraffin wax reacts with oxygen to form carbon dioxide and water vapor. The carbon atoms in the paraffin combine with oxygen from the air to produce heat, light, carbon dioxide, and water. This chemical reaction is why the substances in paraffin change when a candle burns.
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 burning candle a reversible or irreversible change?
Burning a candle is an irreversible change because the wax undergoes a chemical reaction with the oxygen in the air, producing new substances like carbon dioxide, water vapor, and ash. Once the candle has been burned, it cannot be restored to its original state.
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 burning a candle wick a chemical change?
Yes, burning a candle wick is a chemical change. During the burning process, the wax in the candle undergoes combustion, transforming into new substances such as carbon dioxide, water vapor, and other byproducts.
Is burning candle getting shorter physical or chemical change?
Burning a candle is a chemical change because the wax undergoes a chemical reaction with oxygen in the air to form new substances like carbon dioxide and water. This process results in the candle getting shorter as it burns.
Is a burning candle a reversible or non reversible change?
Burning a candle is a non-reversible change because once the wax is melted and the wick is burnt, it cannot be undone to return the candle to its original state. The chemical composition of the wax and wick is changed permanently.
What is burning candle it is physically Chang or chamically?
Burning a candle involves a chemical change, as the wax is being oxidized by the oxygen in the air to produce heat, light, carbon dioxide, and water vapor. This process is irreversible and results in the formation of new substances, which is characteristic of a chemical change.
Is candle burning a reversible change prove it?
Yes, candle burning is a reversible change because it can be undone by extinguishing the flame. When the flame is removed, the wax solidifies again, demonstrating that the process of burning is reversible by cooling down the wax.
Is soot formed as a candle burns a chemical change?
Yes, soot formation when a candle burns is considered a chemical change. This is because the wax molecules in the candle undergo a chemical reaction with oxygen in the air, resulting in the formation of new substances like carbon dioxide, water vapor, and soot particles.
Is it a physical change when a candle changes size by burning?
Yes, burning a candle is a chemical change where the wax is being converted to other substances like carbon dioxide and water vapor, so it is not a physical change. The change in size is a result of the chemical reactions taking place during the burning process.
