From e2e8eb00541331f1426690a183dde5d0a4ffb622 Mon Sep 17 00:00:00 2001 From: eggy Date: Sun, 17 Oct 2021 21:02:58 -0400 Subject: [PATCH] chem: Change lattice enthalpy definition to match Born-Haber cycles It also follows Wikipedia and most other sources now. --- docs/sch4uz.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/sch4uz.md b/docs/sch4uz.md index f78063e..0fdbc2e 100644 --- a/docs/sch4uz.md +++ b/docs/sch4uz.md @@ -167,7 +167,7 @@ Second ionisation energy may increase the peak enthalpy after it has lowered fro ### Lattice enthalpy -The lattice enthalpy of an ionic compound is the **magnitude** of the energy released when 1 mol of an ionic solid is formed from gaseous ions. +The lattice enthalpy of an ionic compound is the energy required to dissociate 1 mol of an ionic solid to its gaseous ions. - It decreases as ionic radius increases due to greater distance and charge separation - It increases as difference in charge increases because the greater charges are more strongly attracted