Question

When CaO is added to water taken in a beaker, rise in temperature is observed. However, when Ba(OH)2 is mixed with NH4Cl, a fall in temperature is observed. Why?

Answer 1

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Answer 2

Answer:

Explanation:

The reaction between water and CaO is an exothermic reaction. Heat is released during exothermic reaction ,rise in temperature is observed

The reaction between Ba(OH)2 & NH4Cl is an endothermic reaction. Heat is absorbed during endothermic reaction, fall in temperature is observed.