Because burnning wood is using energy but breaking is using forces.
When wood burns, it's not wood any more. It turns into smoke, ash, and (maybe) charcoal.
When you break wood, it's still wood.
When you change something into a different substance, that's a chemical change.
Burning of wood is a chemical change because it results in the formation of new substances, such as ash and smoke, due to the combustion process. Cutting wood into small pieces is a physical change because it does not alter the chemical composition of the wood, only its physical state and size.
Burning wood creates a chemical reaction that transforms the wood into water vapor, carbon dioxide, carbon monoxide if there's not enough O2 to make all the carbon happy, plus various other compounds that depend on things like the kind of wood, where it grew, how many nails the carpenter who had it last drove into it, etc., etc., etc.
Cutting it into small pieces just makes small pieces of wood, but they're still wood. It's a physical change.
Burning wood is a chemical change because the chemical composition of the wood changes, and it produces new substances with different properties than the wood. Cutting wood is a physical change because the chemical composition is not changed, the wood just changes size and shape.
burning of wood is a chemical change as it produces heat and cutting it into small pieces is a physical change as there is a change in shape and size.
Yes, burning a match is considered a chemical change because it involves a chemical reaction that changes the composition of the matchstick and produces new substances like ash, carbon dioxide, and water vapor. This is different from physical changes, which do not alter the chemical composition of a substance.
Yes.
No, burning wax is an irreversible change. When wax is burned, it undergoes a chemical reaction that changes it into different substances (carbon dioxide, water vapor, and heat) that cannot be easily reversed.
To prove that the burning of a candle is a physical and chemical change, you can observe the physical changes such as the melting of the wax and the formation of soot. Additionally, you can analyze the chemical changes by noting the production of carbon dioxide and water vapor during the combustion process. By observing both physical and chemical changes, you can demonstrate that burning a candle involves both types of transformations.
A fire (burning, combustion) is a chemical process.
Why is it different? No, it isn't. Burning sugar is a combustion process.
No, they are different processes.
All burning reactions involve chemical reactions (chemical changes).
Burning
both reactions are redox reactions
Examples of physical changes include melting of ice, boiling of water, cutting a piece of paper, breaking a glass, and dissolving salt in water. These changes alter the form or appearance of a substance without changing its chemical composition.
In a fire, physical changes include the conversion of solid material into gas and ash due to combustion, the production of heat and light energy, and the release of smoke and soot. Additionally, there may be visible changes in color, texture, and shape of the materials being burned.
A chemical change is when some thing changes into another energy or substance. It is important to make different things. A example is a piece of wood burning offers heat and light.
Yes, burning (oxidation) is chemical change.
The bubbling of water when boiled is not the result of a chemical reaction. It is due to the conversion of liquid water to water vapor, which forms bubbles as it rises to the surface. This process is physical in nature, involving the phase change from liquid to gas.
- Burning of fossil fuels (or derivatives) in thermal power plants, in buildings, autovehicles, forest fires, etc.
Burning is a chemical reaction with oxygen (oxidation).