We’re asked to determine the approximate bond strength for the Cl-Cl bond in Cl2 based on the given graph showing a plot of the potential energy of two Cl atoms as a function of the distance between them.
Recall that the bond energy is the energy required to break a bond (pull two atoms completely apart)
The bond energy also determines the strength of the bond in a compound.
▪ the higher the bond energy, the higher is the energy required to break up the molecule/compound into its individual atoms
▪higher bond energy→higher bond strength
This means that for the given plot, the bond energy can be measured at the point wherein the Cl atoms have the strongest attractive forces but not too close together that they don't repel each other.
The following plot shows the potential energy of two Cl atoms as a function of the distance between them.
What is the approximate bond strength for the Cl-Cl bond in Cl2 from this graph?
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