Calculate the standard molar entropy chnage for the following reactions at 298 K : (a)4Fe(s) + 3O_(2)(g) to 2Fe_(2)O_(3)(s) [S^(@) (Fe_(2)O_(3)) = 87.4, S^(@)(Fe) = 27.3, S^(@)(O_(2)) = 205.1(all "in"JK^(-1)mol^(-1)) (b) Ca(s) + 2H_(2)O(l) to Ca(OH)_(2)(aq) + H_(2)(g) [S^(@)Ca(OH)_(2) = -74.5, S^(@)(Ca) = 41.42, S^(@)(H_(2)) = 130.7, S^(@)(H_(2)O) = 69.91(all in JK^(-1) mol^(-1)) (c) Na_(2)CO_(3)(s) + 2HCI (aq) to 2NaCI(aq) + H_(2)O(l) + CO_(2)(g) = 115.13, S^(@)(H_(2)O) = 69.9, S^(@)(CO_(2)) = 213.74 (all in JK^(-1)mol^(-1)).

Calculate the standard molar entropy chnage for the following reaction

1.	Calculate the standard molar entropy chnage for the following reactions at 298 K : (a)4Fe(s) + 3O_(2)(g) to 2Fe_(2)O_(3)(s) [S^(@) (Fe_(2)O_(3)) = 87.4, S^(@)(Fe) = 27.3, S^(@)(O_(2)) = 205.1(all "in"JK^(-1)mol^(-1)) (b) Ca(s) + 2H_(2)O(l) to Ca(OH)_(2)(aq) + H_(2)(g) [S^(@)Ca(OH)_(2) = -74.5, S^(@)(Ca) = 41.42, S^(@)(H_(2)) = 130.7, S^(@)(H_(2)O) = 69.91(all in JK^(-1) mol^(-1)) (c) Na_(2)CO_(3)(s) + 2HCI (aq) to 2NaCI(aq) + H_(2)O(l) + CO_(2)(g) = 115.13, S^(@)(H_(2)O) = 69.9, S^(@)(CO_(2)) = 213.74 (all in JK^(-1)mol^(-1)).
Answer» ANSWER :(a)`-549.4 J K^(-1)"mol"^(-1)` (B) `-125.04 J K^(-1)"mol"^(-1)` (c) `264.9 J K^(-1) "mol"^(-1)`