Upon the decomposition of copper(II) carbonate, in the presence of heat, copper(II) oxide and carbon dioxide are formed. Thermal decomposition is a process in which a substance is broken down into two or more simpler substances by the effect of heat. There are four factors that can bring about chemical changes:Īn example of a chemical change involving heat is the thermal decomposition of copper(II) carbonate.
Here is an example of a word equation representing photosynthesis: Product(s) is/are substance(s) present at the end of the chemical reaction.Ĭondition(s) is/are written on top or below the arrow, where they are factors that are required in order for the reaction to take place. Reactant(s) is/are substance(s) present at the start of the chemical reaction. photosynthesis taking place in the chloroplastsĬhemical changes can be represented by word equations.respiration taking place in the mitochondria in the cells.Here are some examples of of chemical changes: During the process of a chemical change, energy, in the form of heat or light or both, may be taken in or given out. change in physical state of matter, such as melting, boiling, evaporation, condensation, freezingĬhemical changes are irreversible and involve the formation of new substances.Here are some examples of physical changes: Physical changes are reversible and do not involve the formation of new substances. Describe the different types of chemical changes.Understand how chemical changes can be represented in word equations.Understand what physical changes and chemical changes are.In the article, the following are the objectives that will be discussed.
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