giúp mình giải bài này với ạ

`CaCl_2 (s) -> CaCl_2 (aq); \Delta H_1`

`CaCl_{2}.6H_2O (s) -> CaCl_2 (aq) + 6H_2O(l); \Delta H_2`

`H_2O (l) -> H_2O (g); \Delta H_3 = 586Cal//g`

`CaCl_{2}.6H_2O (s) -> CaCl_2 (s) + 6H_2O (l); \Delta H_4`

`CaCl_{2}.6H_2O (s) -> CaCl_2 (s) + 6H_2O (g); \Delta H_5`

`\Delta H_1 = (-16,2.10^3)/(100) = -162Cal//g`

`\Delta H_2 = (-20,5.10^3)/(100) = -205Cal//g`

`\Delta H_4 = \Delta H_2 - \Delta H_1 = -205 - (-162) = -43 Cal//g`

`\Delta H_5 = \Delta H_4 + 6.\Delta H_3 = -43 + 586.6 = 3473 Cal//g`