SolutionHard
Question
When KCl dissolves in water (assume endothermic dissolution) :
Options
A.ᐃH = + ve, ᐃS = + ve, ′G = + ve
B.ᐃH = + ve, ᐃS = - ve, ᐃG = - ve
C.ᐃH = + ve, ᐃS = + ve, ᐃG = - ve
D.ᐃH = - ve, ᐃS = - ve, ᐃG = + ve
Solution
Some solids dissolves exothermically as LiCl (ᐃH = - ve) and other dissolved endothermically as KCl (ᐃH = +ve). solvent-solvent interaction and solute-solute interaction are endothermic while solvent-solute interaction is exothermic. The sum of the three interaction determines whether ᐃHsol is endothermic or exothermic.
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