Wood such as paper will burn at 451 degrees Fahrenheit. How it necessarily burns is subject to how much moisture is actually in the wood.
You can place coal in the furnace, then place any wood on the top slot to burn it to charcoal, or use a wood log on the bottom slot and one at the top and it'll burn that way as well.
Smaller surface area, Wood shavings are generally drier than a log of wood, because of the general density of the wood itself. Wood shavings are in turn, easier to burn because of the small amount of moisture in them, therefore, they burn faster, and easier.
Pine tendds to burn very quickly. The exact time will depend on the size of the log, and how dry it is.
it turns into ash
When you burn a log, the chemical energy stored in the wood is converted to heat and light energy through the process of combustion. This process releases energy in the form of heat and light as the bonds holding the molecules in the wood together are broken, resulting in the production of carbon dioxide, water vapor, and ash.
A log burns slowly because it has a higher moisture content and is denser, requiring more heat to ignite and sustain combustion. In contrast, a wood splinter burns quickly because it is thinner, less dense, and has a lower moisture content, allowing it to ignite and burn rapidly.
log, as in a piece of wood = madero or leño log, as in record = anotacion
Wood has a higher ignition temperature than paper, so it requires more heat to start burning. The density and moisture content of wood also make it harder to light with a matchstick compared to the lighter and more flammable paper. Additionally, wood contains more structural components such as lignin that can impede the combustion process.
The chemical composition of a log (and most organic substances) is carbon. Carbon when burned becomes oxides of carbon which are usually gases i.e. carbon dioxide and carbon monoxide. Therefore in essence, most of your log is being vaporized. If you were to burn the log in an enclosure such that none of the gases were lost, you would observe no mass difference.
Table,wood,log,
That is, what they already do. No kind of fire can burn without oxygen!