oblicz entalpie reakcji:
2C + O2 -> 2CO
mając dane:
C + O2 -> CO2 H= -394 kJ
CO + 1/2O2 -> CO2 H=-283 kJ
2C + O2 -> CO2 ΔH = ?
C + O2 -> CO2 ΔH1 = -394kJ | *2
CO + 1/2 O2 -> CO2 ΔH2 = -283 kJ | *-2
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2C + 2O2 + 2CO2 -> 2CO2 + 2CO + O2 ΔH = 2ΔH1 - 2ΔH2
2C + O2 -> 2CO ΔH = -222kJ
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2C + O2 -> CO2 ΔH = ?
C + O2 -> CO2 ΔH1 = -394kJ | *2
CO + 1/2 O2 -> CO2 ΔH2 = -283 kJ | *-2
=================================
2C + 2O2 + 2CO2 -> 2CO2 + 2CO + O2 ΔH = 2ΔH1 - 2ΔH2
2C + O2 -> 2CO ΔH = -222kJ