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Give one example of a combination reaction which'is also exothermic.

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asked Jan 9, 2018 in Chemistry by sforrest072 (157,439 points) ● 61 ● 410 ● 942
edited Jan 24, 2018 by Vikash Kumar

Give one example of a combination reaction which is also exothermic.

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answered Jan 9, 2018 by faiz (82,347 points) ● 6 ● 6 ● 11
selected Jan 24, 2018 by Vikash Kumar
 
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When quicklime or calcium oxide (CaO) reacts with water, slaked lime [Ca(OH)2] is formed. During this reaction, a large amount of heat is released. So, this reaction is an exothermic reaction.
CaO(s) + H2O(l)   ------>Ca(OH)2(aq) +Heat
calcium oxide    water                calcium  hydroxide
  (Quicklime)                                                   (slaked lime)
                                                                

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