Question

Q3. Give two examples of
a) Compounds formed by absorption of heat
b) Compounds formed by evolution of heat​

Answer 1

Answer:

a)Endothermic Reaction Examples

These ions go on to form ammonium hydroxide (NH4OH) and nitric acid (HNO3) respectively (by reacting with the OH– and H+ ions in water). This reaction is endothermic in nature since it cools the surroundings by absorbing heat from it

B)A great many common reactions are exothermic. The formation of compounds from the constituent elements is almost always exothermic. Formation of water from molecular hydrogen and oxygen and the formation of a metal oxide such as calcium oxide (CaO) from calcium metal and oxygen gas are examples.

Explanation:

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