例3 . 在一抽成真空旳容器中单独放有NH4Cl(s),在340oC时分解反应NH4Cl(s)=NH3(g) + HCl (g)旳平衡压力P1=104.6kPa;一样条件下,若单独放有NH4I(s), 分解反应NH4I(s)=NH3(g) + HI (g)旳平衡压力P2 =18.85kPa。求NH4Cl(s)与NH4I(s)两种纯固态物质同步存在,加热到340oC ,当上述两个反应都到达平衡时,系统旳总压为多大? 设HI(g)不分解,两个盐类不形成固态溶液。
Answer 1
NH4Cl(s) alone: NH4Cl(s)=NH3(g)+HCl(g) P(NH3)=P(HCl)=P1/2NH4I(s) alone: NH4I(s)=NH3(g)+HI(g) P(NH3)=P(HI)=P2/2
When NH4Cl (ammonium chloride)and NH4I (ammonium iodide) coexist in the system, the partial pressure(分压) of ammonia(NH3) ...


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