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The solubility of Li2CO3 in water at 298 K is 0.175 mol L–1, and its solubility...

The solubility of Li2CO3 in water at 298 K is 0.175 mol L–1, and its solubility decreases with increasing temperature.

What are the signs of ∆Hº and ∆Sº for the dissolution of Li2CO3? Li2CO3(s) → 2 Li+(aq) + CO3 2–(aq)

(A) ∆H° > 0, ∆S° > 0

(B) ∆H° > 0, ∆S° < 0

(C) ∆H° < 0, ∆S° > 0

(D) ∆H° < 0, ∆S° < 0

The correct answer is D and I do not understand why entropy is negative. Thank you.  

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Answer #1

Answer: xplenncitien is an ide index about wasted enerG Y . Entropy on a Process you get ene19y 4om a SOuTce bimning Puel PoAnswer: Entrop of a 7eacron refers to the posiHona! Probabieities for each neacrant An in gas atom Phose has mo7e oPtions ForCl2cs) iJ PClsPe 3 Ore more mule on ne Psoduc Side There han on ahe eactant side, dhereFore tne ehcnge entropy ill be PasiHve

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