O2(g)+N2(g)==2NO(g)；△H= －kJ/mol O2(g)+2NO(g)==2NO2(g)；△H= －kJ/mol 2NO2(g)==N2O4(g)；△H= －kJ/mol Cu(s)+1/2O2(g)==CuO(s)；△H=－157kJ/mol CaCO3(s)+==CaO(s)+CO2(g)；△H=+1777kJ/mol
-C(石墨) + O2(g) === CO2(g)； △H = －393.51kJ ·mol1
-C(金刚石) + O2(g) === CO2(g)； △H = －395.41kJ ·mol1
-C(石墨) ===C(金刚石)； △H = +1.9kJ ·mol1
NaOH(aq)+HCl(aq)=NaCl(aq)+H2O(l)；△H=－57.3kJ/mol KOH(aq)+HNO3(aq)=NaNO3(aq)+H2O(l)；△H=－57.3kJ/mol
NaOH(aq)+1/2H2SO4(aq)=1/2Na2SO4(aq)+H2O(l)；△H=－57.3kJ/mol
第 19 页 共 19 页
