c) According to Trgin the eText “ when the interacting atomic orbitals contain a

Question

c) According to Trgin the eText “ when the interacting atomic orbitals contain a total of two electrons that can spin-pair (orient with opposite spins)." What would the sign ofHo be if the reactants both had an unpaired electron in their valence shell, and the product was able to pair those electrons (form an additional bond)? the interaction energy is usually negative (or stabilizing) d) If a reaction occurred where bonds were broken and subsequently formed, and energy was given off (exothermic), would you expect the magnitude (absolute value) of the bond breaking process to be greater or of the bond forming process to be greater? Explain

Explanation / Answer

formation of bonds

c) If two reactants both having an unpaired electron combine to form a bond,

the resulting dHo(rxn) would be -ve

The reaction woud be exothermic in nature that is gives off heat.

d) If the reaction is found to be exothermic, then

dHo(rxn) = dHo(reactants) - dHo(products) = -ve value (exothermic)

therefore, bond forming in products is of greater magnitude than the bond breaking process giving overall process -ve dHo(rxn) value.

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