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When CaO is added to water taken in a be...

When CaO is added to water taken in a beaker, rise in temperature is observed. However, when `Ba(OH)_(2)` is mixed with `NH_(4)Cl`, a fall in temperature is observed. Why?

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To understand the temperature changes observed when mixing calcium oxide (CaO) with water and barium hydroxide (Ba(OH)₂) with ammonium chloride (NH₄Cl), we need to analyze the nature of the reactions involved. ### Step-by-step Solution: 1. **Identify the Reactions**: - The first reaction involves calcium oxide (CaO) reacting with water (H₂O). - The second reaction involves barium hydroxide (Ba(OH)₂) reacting with ammonium chloride (NH₄Cl). ...
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