問題詳情
19. A 100-mL sample of water is placed in a coffee cup calorimeter. When 1.0 g of an ionic solid isadded, the temperature decreases from 21.5℃ to 20.8℃ as the solid dissolves. Which of thefollowing is true for the dissolving of the solid?
(A) AH ＜O
(B)
(C)
(D)
(E) none of these