Chemical reactions involve the production of new materials which are quite different from the reacting substances. Any new materials come from the reacting substances.
Changes that may accompany a chemical reaction include colour, appearance and production of new materials, for example, a gas.
Mixing alone may not cause a chemical reaction to take place.
While heat is often necessary to initiate a chemical reaction it is not always necessary.
Chemical reactions are used to produce most of our energy.
Chemical reactions are used extensively to test, identify and analyse a wide range of materials (for example, pool testing kits and forensic tests from television shows such as ‘CSI’).
The oxygen in air is a very reactive chemical and is important in many chemical reactions such as combustion, rusting and the reactions by which we get energy from the food we eat.
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Answer:
Chemical reactions involve the production of new materials which are quite different from the reacting substances. Any new materials come from the reacting substances.
Changes that may accompany a chemical reaction include colour, appearance and production of new materials, for example, a gas.
Mixing alone may not cause a chemical reaction to take place.
While heat is often necessary to initiate a chemical reaction it is not always necessary.
Chemical reactions are used to produce most of our energy.
Chemical reactions are used extensively to test, identify and analyse a wide range of materials (for example, pool testing kits and forensic tests from television shows such as ‘CSI’).
The oxygen in air is a very reactive chemical and is important in many chemical reactions such as combustion, rusting and the reactions by which we get energy from the food we eat.
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