Question

The lattice energy for CsCl is -657 MJ/mol while the lattice energy for BaS is -3500 MJ/mol. Is the bond distance of BaS greater or smaller than that of CsCl? By how much?

1) The bond distance of BaS is greater than that of CsCl by 2843 MJ/mol
2) The bond distance of BaS is smaller than that of CsCl by 2843 MJ/mol
3) The bond distance of BaS is greater than that of CsCl by 2843 pm
4) The bond distance of BaS is smaller than that of CsCl by 2843 pm

Answer 1

The bond distance of BaS is greater than that of CsCl.

Step-by-step explanation:

The bond distance of BaS is greater than that of CsCl. The larger the bond distance, the lower the lattice energy. According to the provided information, the lattice energy for BaS is -3500 MJ/mol, while the lattice energy for CsCl is -657 MJ/mol. Therefore, the bond distance of BaS is greater than that of CsCl.