what is the procedure to follow to break the bonds on heating on organic comp and a comp that contains NO2,Ph,Zn groups?

Dear srikanth,

Chemical energy is part of all chemical reactions. Energy is needed to break chemical bonds in the starting substances. As new bonds form in the final substances, energy is released. By comparing the chemical energy of the original substances with the chemical energy of the final substances, you can decide if energy is released or absorbed in the overall reaction.

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