①C (s)+12O2(g)CO (g)△H=-110.5kJ•mol -1
②C (s)+O2 (g)CO2 (g)△H=-393.51kJ•mol -1
利用盖斯定律,将①×2-②,可得 C(s)+CO2(g)═2CO(g)△H=-221kJ•mol-1+393.51kJ/mol=+172.51KJ/mol,
①C (s)+12O2(g)CO (g)△H=-110.5kJ•mol -1
②C (s)+O2 (g)CO2 (g)△H=-393.51kJ•mol -1
利用盖斯定律,将①×2-②,可得 C(s)+CO2(g)═2CO(g)△H=-221kJ•mol-1+393.51kJ/mol=+172.51KJ/mol,