b. How will you prove that dissolving quicklime in water is an exothermic change?
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When the suspension of the slaked lime settles down at the bottom of the speaker, a clear solution is formed. On blowing the exhaled air, carbon dioxide reacts with the clear solution and the lime water turns milky. The quick lime reaction with water is exothermic in nature due to production of heat
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If it releases heat , it is an exothermic change.
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