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Concept explainers
Interpretation:
Difference between a chemical change and a physical change. Whether the combination of gasoline a chemical change or a physical change or not.
Concept introduction:
The chemical change, in which, the new product is formed and the absorption of energy or the loss of energies are in a different form.
A physical change is defined when the composition of substance does not change. Only state transfer takes place in the physical change.
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Answer to Problem 16STP
When any change in reaction does not modify the composition of any substance, called physical change.
Chemical change is defined as a change where one or more than two substances are changed into other new substances.
The combustion of gasoline is categorized in a chemical change. In this process, gasoline is changed into other substances throughout combustion.
Explanation of Solution
The difference between a physical and a chemical change are mentioned below:
Physical change | Chemical change |
In the physical changes, the change is for a short duration. | These changes are permanent. |
There is very little quantity in were absorption of the heat. | In chemical changes absorption and loss of energy take place. |
The physical changes, there is only phase transfer take place. | The chemical changes are irreversible. |
In the physical changes, no production of energy takes place. | In the chemical changes, the energy produces in the form of light, heat, etc. |
The combustion process is a chemical change because, in this process, a new product is formed. Also, the evolution of gases and energy loss takes place. In the combustion process of gasoline, water is formed as a new product and carbon dioxide gas releases.
Chemical change and physical change describe the different nature of substances. The combustion process is a chemical change because, in this process, a new product is formed which is different from an original product.
Chapter 3 Solutions
Glencoe Chemistry: Matter and Change, Student Edition
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