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+317.3 kJ/mol -379.3 kJ/mol -332.8kJ/mol -317.3kJ/mol
-317.3 kJ/mol -379.3 kJ/mol -332.8 kJ/mol +317.3 kJ/mol
ΔH1-ΔH2 ΔH2-ΔH1 ΔH1+ΔH2 -(ΔH1+ΔH2)
2Zn(s)+2Ag2O(s)===2ZnO(s)+4Ag(s)ΔH=-634.6 kJ·mol-1 Zn+Ag2O===ZnO+2Ag ΔH=+317.3kJ·mol-1 Zn(s)+Ag2O(s)===ZnO(s)+2Ag(s)ΔH=-317.3kJ Zn(s)+Ag2O(s)===ZnO(s)+2Ag(s)ΔH=+317.3kJ·mol-1
Zn(s)+Ag2O(s)=ZnO(s)+2Ag(s) ΔH.=+317.3kJ·mol-1 Zn+Ag2O=ZnO+2Ag ΔH.=+317.3kJ·mol-1 Zn(s)+Ag2O(s)=ZnO(s)+2Ag(s) ΔH.=-317.3kJ 2Zn(s)+2Ag2O(s)=2ZnO(s)+4Ag(s) ΔH.=-634.6 kJ·mol-1
+519.4kJ·mol-1 -519.4kJ·mol-1 +259.7 kJ·mol-1 -259.7 kJ·mol-1
-317.3 kJ/mol -379.3 kJ/mol -332.8 kJ/mol 317.3 kJ/mol
—441.8 kJ/mol —254.6 kJ/mol —438.9 kJ/mol —260.4 kJ/mol
-317.3 kJ/mol -379.3 kJ/mol -332.8 kJ/mol 317.3 kJ/mol
Zn(s)十Ag2O(s)====ZnO(s)+2Ag(s),△H=317.3kJ/mol Zn+Ag2O=====ZnO+2Ag,△H=317.3kJ/mol Zn(s)+Ag2O(s)=====ZnO(s)+2Ag(s),△H=-317.3kJ/mol 2Zn(s)+2Ag2O(s)=====2ZnO(s)+4Ag(s),△H=-317.3kJ
-317.3 kJ/mol -379.3 kJ/mol -332.8 kJ/mol 317.3 kJ/mol
-317.3kJ/mol -379.3kJ/mol -332.8 kJ/mol 317.3 kJ/mol
442.3kJ•mol-1 260.7kJ•mol-1 –442.3kJ•mol-1 -260.7kJ•mol-1
+519.4 kJ·mol-1 +259.7 kJ·mol-1 -259.7 kJ·mol-1 -519.4 kJ·mol-1
-317.3kJ/mol -379.3kJ/mol -332.8 kJ/mol +317.3 kJ/mol
Zn(s)+Ag2O(s)===ZnO(s)+2Ag(s)ΔH.=+317.3kJ·mol-1 Zn+Ag2O===ZnO+2Ag ΔH.=+317.3kJ·mol-1 Zn(s)+Ag2O(s)===ZnO(s)+2Ag(s)ΔH.=-317.3kJ 2Zn(s)+2Ag2O(s)===2ZnO(s)+4Ag(s)ΔH.=-634.6 kJ·mol-1
+519.4 kJ·mol-1 +259.7 kJ·mol-1 -259.7 kJ·mol-1 -519.4 kJ·mol-1
-317.3 kJ/mol -379.3 kJ/mol -332.8 kJ/mol +317.3 kJ/mol
-317.3 kJ·mol-1 -379.3 kJ·mol-1 -332.8 kJ·mol-1 317.3 kJ·mol-1