15.已知下列物质在298.15K时, Delta ([ f(n))^theta (kJcdot mo(l)^-1) 数值。-|||-NiSO4·6H2O(s) NiSO4(s) H2O(g)-|||--2221.7 -773.6 -228.4-|||-(1)计算反应 (O)_(4)cdot 6(H)_(2)Oleftharpoons (NiSO)_(4)(s)+6(H)_(2)O(g) 的 Delta (C)_(m)(298k) ;-|||-(2)计算298K时NiSO4·6 H2O的饱和蒸气压p(H2O);-|||-(3)要使NiSO4·6H22O在空气中不风化,空气中水的蒸汽压要维持多大?

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