Two substances A and B combine to form another substance C. During the combination, heat is evolved and C has properties different from those of A and B. Identify C as element, compound, or mixture.
Two substances A and B combine to form another substance C. During the combination, heat is evolved and C has properties different from those of A and B. Identify C as element, compound, or mixture.
Given that A and B combine to form another substance C and release heat can be represented as follows in the form of chemical equation.
- C can be identified as a compound.
This is because:
- C has properties different than the constituents i.e.; A and B which is true for compounds.
- Heat is evolved in the reaction which indicates that substances have combined chemically and bonds are formed between A and B.
Note that heat is evolved when chemical bonds are formed and heat is required to break the chemical bonds.
- If it was a mixture, then the heat would not have evolved as no chemical bonds are formed between the substances that combine.
- In addition, a mixture does not exhibit properties apart from the properties of the substances combined.
Element: An element is a pure substance that cannot be split into simpler substances.
- Example: Hydrogen , Copper etc.
Compound: A compound is a pure substance in which elements combine chemically in a fixed composition to give a compound.
- They can be broken down into elements that make up the compound by using chemical or electrochemical methods.
- The properties of the compound are entirely different from the elements from which it is formed.
- Example: Water , Common salt i.e.; Sodium chloride
Mixture: When two or more substances (elements or compounds or an element and compound) are mixed in any proportion.
- The components of a mixture can be separated by physical methods of separation.
- Example: A mixture of Sand and Iron can be separated by the use of a magnet (physical process) where Iron gets attracted to the magnet leaving behind sand.
Given that A and B combine to form another substance C and release heat can be represented as follows in the form of chemical equation.
- C can be identified as a compound.
This is because:
- C has properties different than the constituents i.e.; A and B which is true for compounds.
- Heat is evolved in the reaction which indicates that substances have combined chemically and bonds are formed between A and B.
Note that heat is evolved when chemical bonds are formed and heat is required to break the chemical bonds.
- If it was a mixture, then the heat would not have evolved as no chemical bonds are formed between the substances that combine.
- In addition, a mixture does not exhibit properties apart from the properties of the substances combined.
Element: An element is a pure substance that cannot be split into simpler substances.
- Example: Hydrogen , Copper etc.
Compound: A compound is a pure substance in which elements combine chemically in a fixed composition to give a compound.
- They can be broken down into elements that make up the compound by using chemical or electrochemical methods.
- The properties of the compound are entirely different from the elements from which it is formed.
- Example: Water , Common salt i.e.; Sodium chloride
Mixture: When two or more substances (elements or compounds or an element and compound) are mixed in any proportion.
- The components of a mixture can be separated by physical methods of separation.
- Example: A mixture of Sand and Iron can be separated by the use of a magnet (physical process) where Iron gets attracted to the magnet leaving behind sand.
