Chemical Changes
Chemical Properties
Physical Changes
Physical properties
If you are waiting for some bananas to develop, you are waiting for Chemical Change. A chemical change arises when a new constituent is formed through a chemical reaction like when fruit ripens or rots.When something experiences a "chemical reaction" and a new element is formed as a result, we call this chemical change. In some instances, simply adding heat can cause a chemical change. Cooking pancakes, for instance, is an example of a chemical change; the pancake batter goes from a liquid to a solid. Rust forming on metal is a great example of a chemical change. The iron reacts with water and oxygen to create a new Material — rust.
1) Combustion: A combustion reaction is when oxygen combines with another compound to form water and carbon dioxide.
2) Synthesis: A synthesis reaction is when two or more simple compounds combine to form a more complicated one.
3) Decomposition: A decomposition reaction is the opposite of a synthesis reaction - a complex molecule breaks down to make simpler ones.
4) Single displacement: This is when one element trades places with another element in a compound.
5) Double displacement: This is when the anions and cations of two different molecules switch places, forming two entirely different compounds.
6) Acid-base: This is special kind of double displacement reaction that takes place when an acid and base react with each other.
Chemical Changes
Types of Chemical Change
1) Rotting of fruit.
2) Rusting nail.
3) Roasting a marshmallow.
4) Digestion of food.
5) Curdling of milk.
6) Decomposition of waste.
7) Formation of energy in the cells of plants and animals.
8) Burning a log of wood
9) Heating popcorn
10) Baking a cake or pancakes
11) Frying or boiling and egg
12) Photosynthesis - a process when carbon dioxide and water are changed into sugars by plants.
1) Hydrolysis of substances.
2) Paper becomes ash.
3) Mixing an acid with a base which produces water and a salt.
4) Cracking heavy hydrocarbons to create lighter hydrocarbons (part of the process of refining oil).
5) Combustion
6) Explosion of fireworks
7) Mixing chemicals
8) Lighting a match
9) Burning gas in a stove
10) Oxidizing food for energy
11) Freezing water
12) Evaporating water
13) Melting ice
14) Defusing air
Organic Chemical changes
Inorganic Chemical Changes
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