$(I)\, q + W \,\,(II)\, q \,\,(III) \,W \,\,(IV)\, H - TS$
$KC{l_{\left( s \right)}} + 20{H_2}O \to KCl\,\left( {20\,{H_2}O} \right);\Delta H = + 15.90\,kJ$
$KC{l_{\left( s \right)}} + 200{H_2}O \to KCl\,\left( {200\,{H_2}O} \right);\Delta H = + 18.58\,kJ$
${H_2}O(l)$ $\rightleftharpoons$ ${H_2}O(g)$