Ca(OH)2 dissolves exothermically in water and the molar solubility of Ca(OH)2 decreases as the temperature increases. What are the signs of delta H and delta S for dissolving Ca(OH)2?

Answer 1

Take a look at this. https://www.google.com/search?q=signs+for+delta+H+and+delta+S&ie=utf-8&oe=utf-8&client=firefox-b-1

Use dG = dH - TdS. You know dH is negative. What must dS be to give dG - at low T and + at high T.