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C(s)+O2(g)→CO2(g) 2SO2(g)+O2(g)→2SO3(g) 3H2(g)+N2(g)→2NH3(g) CuSO4(s)+5H2O(l)→CuSO4•5H2O(s)
-82kJ/mol -41kJ/mol -312kJ/mol +82kJ/mol
ΔH1>0,ΔH3<0 ΔH2>0,ΔH4>0 ΔH1=ΔH2+ΔH3 ΔH3=ΔH4+ΔH5
CO的燃烧热为283 kJ 右图可表示由CO生成CO2的反应过程和能量关系 2Na2O2(s)+2CO2(s)=2Na2CO3(s)+O2(g) ΔH.>-452 kJ/mol CO(g)与Na2O2(s)反应放出509 kJ热量时,电子转移数为6.02×1023
283kJ/mol -504 kJ/mol -172.5kJ/mol 172.5kJ/mol
178161 -178-161 178-161 -178161
283.5kJ/mo 172.5kJ/mol -172.5kJ/mol -504 kJ/mol
C(s)+O2(g)=CO2(g) C(s)+O2(g)=CO2(g), 2C(s)+2O2(g)=2CO2(g), C+O2=CO2,
-283.01 kJ·mol-1 +172.51 kJ·mol-1 +283.1 kJ·mol-1 +504.00 kJ·mol-1
442.3kJ•mol-1 260.7kJ•mol-1 –442.3kJ•mol-1 -260.7kJ•mol-1
283.5kJ/mol 172.5kJ/mol -172.5kJ/mol -504 kJ/mol
283. kJ·mol-1 +172.5 kJ·mol-1 -172.5 kJ·mol-1l -504 kJ·mol-1