Question

formation of coal from decaying matter is a physical or chemical change ??​

Answer 1

Answer:

When burned, the carbon is converted to carbon dioxide and the hydrogen to water. Each of those reactions produces a slightly different amount of heat. This process cannot be reversed and hence, the burning of coal is a chemical change

Answer 2

Answer:

When burned, the carbon is converted to carbon dioxide and the hydrogen to water. Each of those reactions produces a slightly different amount of heat. This process cannot be reversed and hence, the burning of coal is a chemical change.