Which of the following reactions is an endothermic reaction?
i) Burning of coal.
ii) Decomposition of vegetable matter into compost.
iii) Process of respiration.
iv) Decomposition of calcium carbonate to form quick lime and carbon dioxide.
Answers
Answer:iv) Decomposition of calcium carbonate to form quick lime and carbon dioxide.
Explanation:
The endothermic reaction is the reaction in which the heat is absorbed in the reaction to form the products.
The calcium carbonate can be heated so as to undergo thermal decomposition and form products like calcium oxide and water.
Answer:
The endothermic reaction is (iv) decomposition of calcium carbonate to form quick-lime and carbon dioxide.
Explanation:
In this reaction, calcium carbonate decompose in the presence of energy formed by the heat (thermal decomposition). Heat absorbed in this reaction resulting in the formation of calcium oxide or quick-lime and carbon dioxide. The strongly heated calcium carbonate absorbs heat from the reaction to form a solid (quick lime) and gas (carbon dioxide).
Calcium oxide dissolved in water forms lime water which is nothing but calcium hydroxide. Energy is absorbed from the outer source or surrounding for the reaction to take place is known as endothermic reaction.
To learn more:
Why photosynthesis is called an endothermic reaction?
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State the differences between exothermic and endothermic reactions.
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