Question

The data in the table below are for the ionic substances, when they are placed in water at 298K and 1 bar:

AB (s) + H₂O(l) --> A^positive(aq) + B ^negative(aq), where AB(s) is either NaCl, CaCl₂, or BaSO₄

∆H⁰_solution (kJ/mol)  ∆S⁰_solution (J/K mol)  ∆G⁰_solution (kJ/ mol)

              NaCl       +3.6                     +42.7                         – 9.1

              CaCl₂   – 81.4                    – 47.6                         – 67.2

              BaSO₄   +26.2                   –104.1                         +57.2

If AB is a compound that dissolves in water even though the entropy is unfavorable, then AB is

	a.	none of these compounds
	b.	CaCl2
	c.	BaSO4
	d.	NaCl

Answer 1

Here, the given equation in water at 2988 and I tan is: (29) ABCs) & Hoolel I where ABCs) A positive caq) +B Legature (29) is either Nach, Calla a Basoy. Dica. OH Solution Calmol on solution (u Ilmodi (Solution kamo 9.1 Mac cacia +36 - 81.4 +428.7 - 47.6 -104,1 :- 67.22 Bosoy +2612 +57.2 Kilmal Hell, you can see llach Hat dimodre in wath the .. frecen is endothermic becaule DH = +3:6, but become - Dao = -9. 10miCare) so the process is spontaneous in Basoy, the forcess is ente themie but 04 = +57.2 KJ/mot meons procen is nou - spontaneous .. so AB Gm found is Nach tat dinolives in watter even - through the frown is ento themily Scanned with CamScanner