CBSE Class 11-science Answered
How can we say from a set of reactions that it is endothermic or exothermic by only reactions?
Asked by Amit Gautam | 08 Nov, 2013, 02:29: PM
Expert Answer
To determine whether the reaction is exothermic or endothermic only by looking at the reaction, following method will be helpfull:
If the reaction is Exothermic, the term- 'Heat' or 'Δ' sign will be written on the product side (R.H.S.).
If the reaction is Endothermic, the term- 'Heat' or 'Δ' sign will be written on the reactant side (L.H.S.).
For example:
|
Exothermic reaction The chemical reactions which proceed with the evolution of heat energy are called as exothermic reactions. A + B → C + Δ For example: 2SO2 + O2 2SO3 + Δ CaO + H2O → Ca(OH)2 + Δ |
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Endothermic reactions The chemical reactions which proceed with the absorption of heat energy are called as exothermic reactions. A + B + Δ → C For example: C + H2O + Δ → CO + H2 N2 + O2 + Δ 2NO |
Answered by Hanisha Vyas | 08 Nov, 2013, 05:50: PM
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