Is it true that the higher the lattice energy the higher the bond strength
Actual Question-
The lattice energy of NaCl is -787.5kJ/mol and the lattice energy of K is -715kJ/mol
What compound is the bonding between ions stronger? Why?
2006-10-11 15:52:47 · 1 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Yes. Bond strength is (kq1q2/r0)(1-1/n) where k=8.99x10^9 and r0 is interatomic distance, q1 and q2 are charges on each atom. n is a correction, different for everything, often approximated as infinity.
Lattice energy is Na(Bond Energy)(madelung constant)
Madelung constant is based on crystal structure, not elements. Na is avogadro's number. Higher bond energy for two things crystalizing in the same structure means higher lattice energy.
For instance, MgO and NaCl crystalize in the rock salt structure. MgO has stronger bonds, and hence lattice energy, because its q1 and q2 are double that of NaCl.
2006-10-12 08:32:39 · answer #1 · answered by calcu_lust 3 · 0⤊ 0⤋