Respuesta :


Which ionic bond is predicted to have the smaller bond enthalpy, Li—F or Cs—F? For covalent compounds, closer the atoms stronger is the bond and more is the bond enthalpy. Similarly, for ionic compounds, smaller the size of ions closer the ions and stronger is the bond and more is the bond enthalpy.

The ionic bond that will have a smaller bond enthalpy is CsF.

Ionic bonds consists of an ion pair. Ionic bonds are formed when a metal donates electrons to a non metal. The metal forms the cation while the nonmetal becomes the anion. The strength of the ionic bond depends on the size of the ions.

The smaller the ions in the compound, the stronger the bond and the larger the bond enthalpy. It follows that since the Li^+ is smaller than Cs^+, the bond enthalpy of CsF will be smaller than the bond enthalpy of LiF.

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Missing parts;

We can define average bond enthalpies and bond lengths for ionic bonds, just like we have for covalent bonds. Which ionic bond is predicted to have the smaller bond enthalpy, Li-F or Cs- F?