Chemical change, because it is irreversible. The chemical composition of the substance actually changes.
A physical change is a change of state, like water to ice. There, H20 is still H20.
Physical deary physical or it could be chemical we shall never know
The burning part of the story is a chemical change. When the ashes fall down or the gasses blow away, those are physical changes.
chemical change
All burning reactions are chemical.
Chemical
Burning the log is a chemical change. All of the others are physical changes.
Because burning a log in a fireplace involves a chemical change and sawing a log in half only reguires a physical change.
Although it has physical consequences, burning a log is a chemical change. The molecules of the log react with oxygen to form carbon dioxide, water steam, and many other products. A simple, fairly reliable test to tell the difference between physical and chemical changes is: Can the process be reversed rather easily? If the answer is yes, like dissolving salt in water, it is a physical change; if no, a chemical change.
Yes.
A log is a mixture regardless of whether it is burning.
No. Burning a log is a chemical change since the fire turns the wood into ash, water vapor, carbon dioxide, and elemental carbon.
It is a chemical change. A physical change to the log would be, for example, cutting the log in two. When it burns, it turns into CO2 and H2O, so it can't be turned back into a log.
No, it is a physical change. If you think about cutting the wood, the pieces will be smaller than the log, but they will have all of the same properties as they did when they were put together. An example of a chemical change is burning the wood. The act of burning it would be a chemical change since it is converting the wood into carbon and water vapor.
chemical
no. it is a chemical change.
physical
Melting is a physical change.