Paper is essentially a hydrocarbon, meaning its molecules are made from carbon and hydrogen (there may be some oxygen or other elements present, depending on the paper). The reaction of a hydrocarbon with oxygen is one type of combustion that most people just call "burning." The products of the combustion of any hydrocarbon are primarily carbon dioxide and water (in the form of steam). There's other products since air isn't purely oxygen and paper isn't purely hydrocarbons, but your most basic equation would be:
paper + oxygen --> carbon dioxide + steam
... or with symbols ...
a CxHy(s) + b O2(g) --> CO2(g) + d H2O(g)
... where a, b, c, and d are the stoichiometric coefficients, x and y are the specific composition of paper, and "(s)" means solid and "(g)" means gas.
For more info:
http://en.wikipedia.org/wiki/Hydrocarbon
http://en.wikipedia.org/wiki/Combustion
The ripening of a tomato is a chemical property, as it involves the process of biochemical changes within the tomato fruit that result in changes in color, texture, and flavor. These changes are driven by enzymes and other chemical reactions that occur within the fruit as it matures.
Examples of chemical changes that occur around us include burning wood (combustion), rusting of iron (oxidation), and cooking food (chemical reactions in the ingredients). Examples of chemical changes that occur within us include digestion of food (enzymatic reactions), respiration (breaking down glucose for energy), and metabolism of medications in our bodies.
Heat?
When physical changes occur in matter, the substance's state or appearance changes without altering its chemical composition. In contrast, chemical changes involve a modification in the substance's chemical composition, resulting in the formation of new substances.
The chemical that burns in air is oxygen. Oxygen is a highly reactive gas that readily supports combustion, which is why it is essential for most combustion processes to occur.
it is a chemical change because it causing the fuel to burn
The ripening of a tomato is a chemical property, as it involves the process of biochemical changes within the tomato fruit that result in changes in color, texture, and flavor. These changes are driven by enzymes and other chemical reactions that occur within the fruit as it matures.
Examples of chemical changes that occur around us include burning wood (combustion), rusting of iron (oxidation), and cooking food (chemical reactions in the ingredients). Examples of chemical changes that occur within us include digestion of food (enzymatic reactions), respiration (breaking down glucose for energy), and metabolism of medications in our bodies.
Some wax burns, and as it does so, chemical changes occurs. Wax converts to CO2, CO, and H2O. That is an exothermic reaction The rest of the wax melts with the increased temperature. That is the physical change.
When LPG comes out of the cylinder, it changes from a liquid to a gas which is a physical change. When it burns, it undergoes a chemical change where it reacts with oxygen to produce heat, light, carbon dioxide, and water vapor.
Chemical changes occur after a chemical reaction.
Any chemical change occur.
it harms the environment. temperature changes and climate changes occur because of chemical weathering.
no
Heat?
When physical changes occur in matter, the substance's state or appearance changes without altering its chemical composition. In contrast, chemical changes involve a modification in the substance's chemical composition, resulting in the formation of new substances.
The chemical that burns in air is oxygen. Oxygen is a highly reactive gas that readily supports combustion, which is why it is essential for most combustion processes to occur.