Is the burning of wood a physical or chemical reaction?
Is the burning of wood a physical or chemical reaction? Burning of wood is a chemical change as new substances which cannot be changed back (e.g. carbon dioxide) are formed. For example, if wood is burned in a fireplace, there is not wood anymore but ash. Compare: Physical change - The opposite of a chemical change is a physical change. Which is a chemical change in a log? A log burns in the fireplace. Identify the chemical change in the following list. A) A shoelace breaks. B) A log burns in the fireplace. C) A cat meows. D) A crayon...