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CBSE Class 10 Answered

When calcium oxide is added to water taken in a beaker,rise in temperature is observed.What happens when barrium hydroxide is mixed with ammonium chloride?.Why?
Asked by amar chandniranjan | 11 Jun, 2014, 09:50: PM
answered-by-expert Expert Answer

When Calcium oxide is added to water taken in a beaker, the following reaction takes place:

CaO + H2O → Ca(OH)2 + heat

As the reaction is exothermic, rise in temperature is observed.

When Barium hydroxide is mixed with Ammonium chloride, the following reaction takes place:

2NH4Cl + Ba(OH)2 → BaCl2 + 2NH3 + 2H2O

This is an endothermic reaction. Hence, a fall in temperature is observed.

Answered by Prachi Sawant | 12 Jun, 2014, 10:47: AM

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