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Is it a physical change when a candle changes size by burning?
Oh, dude, yes, it's totally a physical change when a candle burns and changes size. The wax is melting and then solidifying again as it cools down, so it's like a hot and cold dance party for the molecules. It's not like the candle magically grows or shrinks, it's just physics doing its thing.
If a candle burning example of?
Candle burning is the process called oxidation. This is, it's the reaction that takes place when a gaseous material reacts with oxygen, the wax needs to change to gaseous state for the reaction to take place.
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 burning newspaper a physical change?
Yes, burning newspaper is a chemical change because it undergoes a chemical reaction (combustion) that changes its chemical composition. The heat and flame produced during burning are evidence of this chemical reaction taking place.
What is the metal bit that holds the candle wax in place called?
A candlestick, chamberstick, or candelabrum.
Is a candle burning chemical change?
Yes, burning a candle is a chemical change. New chemical compounds are being formed as the reaction continues. The paraffin in the candle is a hydrocarbon chain, and it is "breaking down" chemically using oxygen from the air to form (idealy) carbon dioxide and water. But there are also physical changes that take place at the same time. Phenomena during the candle burning: - melting (physical phenomenon) - evaporation (may be considered a chemical but also a physical phenomenon) - oxydation - reaction with oxygen, burning (chemical phenomenon) - thermal decomposition (chemical phenomenon)
Is it a physical change when a candle changes size by burning?
Oh, dude, yes, it's totally a physical change when a candle burns and changes size. The wax is melting and then solidifying again as it cools down, so it's like a hot and cold dance party for the molecules. It's not like the candle magically grows or shrinks, it's just physics doing its thing.
Why burning of candle is a physical and chemical change?
CHEMICAL
In a candle explain both changes using the big idea of energy?
When a candle is burnt a physical AND chemical change takes place. Its a physical change when the wax is being melted because the chemical structure has not change, meaning it cannot be a chemical change. Its also a chemical change because you are burning the string. When you burn something the chemical structure DOES change, meaning it is a chemical change.
If a candle burning example of?
Candle burning is the process called oxidation. This is, it's the reaction that takes place when a gaseous material reacts with oxygen, the wax needs to change to gaseous state for the reaction to take place.
When candle is broken in half does this indicate that only a physical change is taking place?
Yes.That's a physical change only.
What evidence is there when a candle burns that a physical change takes place?
The was becomes liquid and drips down the rest of the candle.
How can you tell that the burning of a candle causes both physical and chemical change?
By observation: 1. A flame shows that heat is being generated, indicating a chemical change taking place. 2. A physical change would be the solid wax changing to liquid under the flame.
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.
What physical change is shown taking place in burning wood?
chemical change.
When you place a glass rod over a burning candle it gets black what change happens to the glass rod as the candle burns?
The blackening of the glass rod is due to the deposition of soot (carbon) from the candle flame onto the surface of the glass rod. This is a physical change where the soot particles adhere to the glass surface but do not chemically alter the glass itself.
Is burning a candle wick a chemical change?
It is a chemical change because you can't put it back together exactly the way it was before. Yes, a chemical change is taking place. Even simple cooking produces chemical changes. The smoke and the temperature change are good signs a chemical change is taking place
