4.9某化合物A的水合晶体A·3H2 O脱水反应过程为-|||-cdot 3(H)_(2)O(s)=!=!= Acdot 2(H)_(2)O(s)+(H)_(2)O(g) K-|||-cdot 2(H)_(2)O(s)=!=!= Acdot (H)_(2)O(s)+(H)_(2)O(g) Ke-|||-cdot (H)_(2)O(s)=!=!= A(s)+(H)_(2)O(g) Ke^3-|||-为使A·2H2O晶体保持稳定(不发生潮解或风化),则容器中水的蒸气压p(H2O)与平衡-|||-常数的关系应满足-|||-(A) _(2)^theta gt p((H)_(2)O)/(p)^theta gt (K)_(3)^theta ; (B) ((H)_(2)O)/(p)^theta gt (K)_(2)^theta ;-|||-(C) ((H)_(2)O)/(p)^theta gt (K)_(1)^theta ; (D) _(1)^theta gt p((H)_(2)O)/(p)^theta gt (K)_(2)^theta

4-13 273K时,反应-|||-(Cl)_(2)cdot 6(H)_(2)O(s)leftharpoons (S)_(r)(Cl)_(2)cdot 2(H)

在 600 K、100 kPa 压力下，生石膏的脱水反应为(CaS)({{O)}_4}cdot 2({{H)}_2}(O)({( {s) )}=}(CaS)({

[单选题]有反应：Fe2O3（s）+3H2（g）2Fe（s）+3H2O（l），此反应的标准平衡常数表达式应是：（）A . AB . BC . CD . D

([ {(Si{O)_(2))}_(m)cdot n(S{O)_(3)}^2-cdot 2(n-x)(H)^+] }^2x--|||-C. ((Si{O)_(2

26.在600K,100 kPa压力下,生石膏的脱水反应为-|||-(O)_(4)cdot 2(H)_(2)O(s)arrow CaS(O)_(4)(s)+2(

26.在600K,100 kPa压力下,生石膏的脱水反应为-|||-(O)_(4)cdot 2(H)_(2)O(s)arrow CaS(O)_(4)(s)+2(

(H)_(2)(g)+(O)_(2)(g)=!=!= 2(H)_(2)O(l) Delta (H)_(3)=-572kJcdot mo(l)^-1-|||-_

(2) _(2)(O)_(2)+(I)^-+(H)^+ →-|||-(4) FeCl3+H2S- →-|||-(6) +HN(O)_(3) (浓)→-|||-(

373 K 时，2(NaHC)({{O)}_3}( (s) )leftharpoons (N)({{a)}_2}(C)({{O)}_3}( (s) )+(C)(

_(2)(g)+dfrac (1)(2)(O)_(2)(g)=!=!= (H)_(2)O(1) Delta (H)_(2)=-285.5kJ-|||-cdot