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Burning a candle is a chemical change that happens relatively quickly. The heat from the flame melts the wax, which is then vaporized and reacts with oxygen in the air to produce light, heat, carbon dioxide, and water vapor. This process is a combustion reaction, which is a type of chemical change.
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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 the burning of fuel in a car a chemical or physical change?
Well, isn't that a happy little question! When fuel burns in a car, it undergoes a chemical change because the molecules in the fuel react with oxygen to form new substances like carbon dioxide and water vapor. It's like nature's own magic show happening right in your engine! Just remember, every little change is just a new opportunity for something beautiful to happen.
What happen if you cover burning candle with a glass cup and surrounds it with water?
If you cover a burning candle with a glass cup and surround it with water, the flame will eventually go out due to lack of oxygen inside the glass cup. The water surrounding the cup may help dissipate the heat generated by the candle, but it will not affect the flame itself unless the water somehow extinguishes it. It's important to exercise caution when attempting such experiments to avoid accidents.
Physical change definition?
A physical change is a term that contrasts a chemical change. A physical change is any change that does not alter the chemical identity of a substance.Usually an object that was physically changed can be reverted back to its original state (i.e. water and ice), while a chemical change cannot (i.e. paper burning).
Can physical and chemical change happen to the same object at the same time?
yes,sometimes both changes occur together. For example, when a person eats chocolate and then digests it a physical and a chemical change takes place. When the person chews the chocolate and breaks it into smaller pieces - it is a physical change. No new substances have been formed yet.Once acted upon by saliva and other digestive juices, the chocolate is broken down into other simpler substances, which can be absorbed by the blood. This is a chemical change.
What is a chemical change that can happen in your home?
Cooking an egg or burning logs on a fire.
What would happen to a burning candle if you put it in the space shuttle?
It would stop burning if there was no oxygen.
What will happen if a candle is placed in a basin of water covered with a cup?
If burning, the candle will use up all the oxygen and go out.
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 the burning of fuel in a car a chemical or physical change?
Well, isn't that a happy little question! When fuel burns in a car, it undergoes a chemical change because the molecules in the fuel react with oxygen to form new substances like carbon dioxide and water vapor. It's like nature's own magic show happening right in your engine! Just remember, every little change is just a new opportunity for something beautiful to happen.
Are there instances that physical and chemical happen simultaneously?
yes burnig of candle chewing of food
What has to happen for a chemical change to happen?
At least 2 of the reactants must change their chemical formula.
What chemical change can happen in the home?
Cooking involve a chemical change.
Why is the freezing of water classifyed as a physical change?
Freezing of water is a physical change because it is becomin solid through means of temperature. Chemical changes happen due to burning or wear and tear.
Is a fire a physical or chemical change?
A fire is a chemical change due to the irreversible changes that happen.
Does a chemical change happen when you curse?
No chemical change happens, though a consequential change probably will.
What happen if a big and a small burning candle is covered with a big jar?
Once the oxygen was used up, both candles would go out.
