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灰锡转化为白锡的反应是放热反应 锡在常温下以灰锡状态存在 △H1>△H2 锡制器皿长期处于低于13.2℃的环境中,会自行毁坏
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[(h1 h2)S]/2 2S/(h1 h2) (S/h1 ) (S/H2) [(h1 h2)S]/h1h2 [MN10T44]
ΔH1>ΔH2 ΔH1<ΔH2 ΔH1=ΔH2 无法确定
S(s) + O2 (g) =SO2 (g); △H1 S(g) + O2 (g) =SO2 (g);△H2 2H2(g) + O2 (g)= 2H2O(g);△H1 2H2 (g) + O2 (g) = 2H2O(l);△H2 CO(g) + 1/2 O2(g) = CO2(g);△H1 2CO(g) + O2(g) = 2CO2(g);△H2 H2 (g) +Cl2(g)=2HCl(g);△H1 1/2 H2(g) + 1/2 Cl2(g) = HCl(g);△H2
C.+ H2O == CO + H2 ∆H= +131.3 kJ mol H -1 C(s)+ H2O(g) == CO(g) + H2(g) ∆H= +10.94 kJ·mol -1 C(s)+ H2O(l) == CO(g) + H2(g) ∆H= +131.3 kJ· mol -1 C(s)+ H2O(g) == CO(g) + H2(g)∆H= +131.3 kJ· mol -1
2H2(g) + O2(g)= 2H2O(g) △H1 ; 2H2(g) + O2(g) = 2H2O(l) △H2 S(g) + O2(g) =SO2(g) △H1 ; S(s) + O2(g) = SO2(g) △H2 CO(g) + 1/2 O2(g) = CO2(g) △H1 ;2CO(g) + O2(g) = 2CO2(g) △H2 C.(s)+H2O(g)=CO(g)+H2(g) △H1 ;CaO(s)+H2O(l)===Ca(OH)2(s) △H2
2H2(g)+O2(g) ==2H2O(l) △H1; 2H2(g)+O2(g) ==2H2O(g) △H2 N2(g)+3H2(g) 2NH3(g) △H1; CaCO3(s) == CaO(s)+CO2 (g) △H2 C.(s)+O2(g) == CO(g) △H1;C.(s)+O2(g) == CO2(g) △H2 H2(g)+Cl2(g) ==2HCl(g) △H1; H2(g)+Cl2(g) == HCl(g) △H2
ΔH1>ΔH2 锡制器皿长期处于低于13.2 ℃的环境中,会自行毁坏 锡在常温下以灰锡状态存在 灰锡转化为白锡的反应是放热反应
△H1>△H2 锡在常温下以灰锡状态存在 灰锡转化为白锡的反应是放热反应 锡制器皿长期处于低于13.2℃的环境中,会自行毁坏