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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: artem.metelskiy on March 03, 2011, 05:47:21 PM

Title: Determining Lattice energy
Post by: artem.metelskiy on March 03, 2011, 05:47:21 PM

For each pair, choose the compound with the higher lattice energy:
a)BaS or CsCl       b) LiCl or CsCl

I'm not very sure how to determine this.
Did i take the right approach here?
a) I say that BaS has higher lattice energy because it has higher charges on ions
b) LiCl has higher lattice energy because Li⁺ is smaller in size than Cs⁺

Am i correct? thanks

Title: Re: Determining Lattice energy
Post by: Borek on March 03, 2011, 06:21:52 PM

Looks OK to me. Such comparisons can be risky, but the compounds are selected in such a way that all other parameters are close or at least very similar, so approach works here.