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2FeCl3(aq)+2KI(aq) = 2FeCl2(aq)+2KCl(aq)+I2(aq) △H <0 Ba(OH)2·8H2O(s)+2NH4Cl(s) = BaCl2(aq)+2NH3·H2O(aq)+8H2O(l)△H >0 4Al(s)+ 6H2O(1)+ 3O2(g)==4Al(OH)3(s) △H <0 Zn(s)+2MnO2(s)+2H2O(1) = 2MnOOH(s) +Zn(OH)2(s) △H <0
HF的电离方程式及热效应:HF(aq)===H+(aq)+F.-(aq) ΔH>0 在氢氧化钠溶液与盐酸的反应中,盐酸量一定,氢氧化钠溶液量越多,中和热越大 ΔH2=-57.3 kJ·mol-1是强酸和强碱在稀溶液中反应生成可溶盐的中和热 稀硫酸与稀氢氧化钡溶液反应的热化学方程式为: H2SO4(aq)+Ba(OH)2(aq)===BaSO4(s)+ 2H2O(l)ΔH.=-114.6 kJ·mol-1
CH3COOH(aq) + NaOH(aq) = CH3COONa (aq) + H2O(l); △H=-57.3KJ/mol H2SO4(aq) + Ba(OH)2(aq) = BaSO4 (s) + 2 H2O(l) ; △H= -114.6KJ/mol HCl(aq) + NaOH(s) = NaCl (aq) +H2O(l) ; △H= -57.3KJ/mol HI(aq) + KOH(aq) = KI(aq) + H2O(l) ;△H= -57.3KJ/mol
ΔH.1=ΔH.2=-57.3 ΔH.1>ΔH.2=-57.3 ΔH.1<ΔH.2<-57.3 无法比较
NaOH(aq)+HCl(aq) NaCl(aq)+H2O(l);△H=+28.7kJ/mol NaOH(aq)+HCl(aq) NaCl(aq)+H2O(l);△H=-28.7kJ/mol NaOH(aq)+HCl(aq) NaCl(aq)+H2O(l);△H=+57.4kJ/mol NaOH(aq)+HCl(aq) NaCl(aq)+H2O(l);△H=-57.4kJ/mol
2H2(g) + O2(g) = 2H2O(l) △H<0 2FeCl3(aq) + Fe(s) = 3FeCl2(aq) △H<0 2CH3OH(l) + 3O2(g) = 2CO2(g) + 4H2O(l) △H<0 NaCl(aq) + AgNO3(aq) = AgCl(s) + NaNO3(aq ) △H<0
NH3(g)+HCl(g)=NH4Cl(s) CaCO3(s)=CaO(s)+CO2(g) 4Al(s)+3O2(g)=2A12O.3(s) HCl(aq)+NaOH(aq)=NaCl(aq)+H2O.(1)
NH3(g) + HCl(g) = NH4Cl(s) CaCO3(s) = CaO(s)+ CO2(g) 4Al(s) + 3O2(g) = 2Al2O3(s) NaOH(aq) + HCl(aq) = NaCl(aq) + H2O(l)
2FeCl3(aq)+2KI(aq) = 2FeCl2(aq)+2KCl(aq)+I.2(aq) △H <0 Ba(OH)2·8H2O(s)+2NH4Cl(s) = BaCl2(aq)+2NH3·H2O(aq)+8H2O(1) △H >0 4Al(s)+ 6H2O(1)+ 3O2(g)==4Al(OH)3(s) △H <0 Zn(s)+2MnO2(s)+2H2O(1) = 2MnOOH(s) +Zn(OH)2(s) △H <0
CH3COOH(aq) + NaOH(aq) = CH3COONa (aq) + H2O(l); △H=-57.3KJ/mol H2SO4(aq) + Ba(OH)2(aq) = BaSO4 (s) + 2 H2O(l) ; △H= -114.6KJ/mol HCl(aq) + NaOH(s) = NaCl (aq) +H2O(l) ; △H= -57.3KJ/mol HI(aq) + KOH(aq) = KI(aq) + H2O(l) ;△H= -57.3KJ/mol
CH4(g)+2O2(g) → CO2(g)+2H2O(g)+Q.1 CH4(g)+3/2O2(g) → CO(g)+2H2O(g)+Q.2 S(s)+O2(g) → SO2(g)+Q.1 S(g)+O2(g) → SO2(g)+Q.2 CaO(s)+CO2(g) →CaCO3(s) +Q.1 CaO(s)+ H2O(l) → Ca(OH)2(aq)+Q.2 HCl(aq)+NaOH(aq) → NaCl(aq)+H2O(l)+Q.1 CH3COOH(aq)+KOH(aq) → CH3COOK(aq)+ H2O(l)+Q.2
2H2(g)+O2(g)==2H2O(l) △H<0 HCl(aq)+NaOH(aq)==NaCl(aq)+H2O(l) △H<0 2Al(s)+3Cl2(g)==2AlCl3(s) △H<0 Zn(s)+2HCl(aq)==ZnCl2+H2(g) △H<0
2H2(g)+O2(g)==2H2O(l) △H<0 HCl(aq)+NaOH(aq)==NaCl(aq)+H2O(l) △H<0 2Al(s)+3Cl2(g)==2AlCl3(s) △H<0 Zn(s)+2HCl(aq)==ZnCl2+H2(g) △H<0
HCl(aq)+ NaOH(aq)=== NaCl(aq)+ H2O(l) △H < 0 2CH3OH(l)+3O2(g)=== 2CO2(g)+ 4H2O(l) △H < 0 Zn(s)+CuSO4(aq)=== ZnSO4(aq)+Cu(s) △H < 0 2H2(g)+ O2(g)=== 2H2O(l) △H < 0
CH4(g)+2O2(g)==CO2(g)+2H2O(l) HNO3(aq)+NaOH(aq)==NaNO3(aq)+H2O(l) 2H2(g)+O2(g)==2H2O(l) 2FeCl3(aq)+Fe(s)==3FeCl3(aq)