The dissolution of .6 in a large volume of water is endothermic to the extent of 3.5 kcal/mol. For the reaction, (s) + 6(l) - .6(s); δ H is -23.2 kcal. The heat of solution of anhydrous in large quan

Question

The dissolution of $CaCl_2$.6$H_2O$ in a large volume of water is endothermic to the extent of 3.5 kcal/mol. For the reaction, $CaCl_2$(s) + 6$H_2O$(l) -> $CaCl_2$.6$H_2O$(s); δ H is -23.2 kcal. The heat of solution of anhydrous $CaCl_2$ in large quantity of water will be

Prashant Kotian · Accepted Answer

Correct answer: C. Given: .6(s) + aq -> (aq); δ H = +3.5 kcal/mol. (s) + 6(l) -> .6(s); δ H = -23.2 kcal/mol. Adding these two: (s) + aq -> (aq) + 6(l); δ H = -23.2 + 3.5 = -19.7 kcal/mol. The heat released is 19.7 kcal/mol, and the heat of solution of anhydrous (as a magnitude/value) is +19.7 kcal/mol according to the answer key.

💡 Solution & Explanation

Practice 22,000+ questions like this