(a) Define a combination reaction.
(b) Give one example of a combination reaction which is also exothermic.
(c) Give one example of a combination reaction which is also endothermic.
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(a) Combination reaction:
- The combination reaction is a process in which two or more reactants combine to produce single product.
- The reactants 'A' and 'B' combines to produce 'AB' as product.
(b) Exothermic reaction:
- The exothermic reaction occurs with decrease in enthalpy and increase in entropy.
- In this process, the heat is released to the surrounding.
- For example: Reaction between quick lime and water.
(c) Endothermic reaction:
- The endothermic reaction occurs with decrease in entropy and increase in enthalpy.
- In this process, the heat is absorbed from the surrounding.
- For example: Mixing ammonium chloride with water to produce aqueous ammonium chloride.
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Answered by
2
Exothermic Releases Heat and vice versa for Endothermic
Explanation:
a.) When two or more materials combine to give a single substance with either getting heated or releasing heat are called combination reaction.
b.) The example for exothermic reaction is -
Calcium Oxide + Water --> Calcium Hydroxide and Heat
c.) The example for endothermic reaction is -
Reaction is endothermic as heat is given to the reaction.
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