Due to its bigger size compared to bromide ions, iodide ions have a poorer charge-to-volume ratio.
Iodide ion has a lower ratio of charge to volume because iodine is bigger and has the same charge as both other ions. Ca ions have a lower ratio of charge to volume than Sc ions because they are larger in size and have less charge than Sc ions. Due to its bigger size compared to potassium ions, bromide ions have a poorer charge-to-volume ratio. Sulfate ions have a larger charge density than ClO4 ions do because sulfate ions have more charge than ClO4 ions do.
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Answer:
+60 kJ
Explanation:
Activation energy = PE(AB) - PE(A+B) = 100 -40 = +60 kJ
Lewis structure for each of the following N₂O₃ with no N¬N bond is attached below.
Even though pi symmetry occupies the antibonding orbitals of NO, this is unimportant after the dimer forms. A sigma connection exists. The enthalpy of the newly formed sigma bond in the dimer is low because the loss of a particularly distinctive set of single-electron resonance forms that were available for no monomer offset the net gain in bond. When the whole free energy is taken into account, there is no gain because the entropic effects are on the order of 1030kJ/mol, and dimerization is entropically disfavored at G=17kJ/mol. Therefore, any little increase in enthalpy is cancelled out by the loss of entropy.
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