2CO g O2 g 2CO2 g Given that H CO is -110 4 kJm... - JAMB Chemistry 2004 Question
2CO(g) + O2(g) → 2CO2(g)
Given that ΔH[CO]is -110.4 kJmol-1 and ΔH[CO2] is -393.0 kJmol-1, the energy change for the reaction above is
Given that ΔH[CO]is -110.4 kJmol-1 and ΔH[CO2] is -393.0 kJmol-1, the energy change for the reaction above is
A
-503.7 kJ
B
-282.6 kJ
C
+282.6 kJ
D
+503.7 kJ
correct option: b
Energy change (ΔH) = 2ΔHCO2 - (2ΔHCO + ΔHO)
= 7x - 393 - (7 * 110.4 + 0)
= -393 + 110.4 = -282.6 kJ
= 7x - 393 - (7 * 110.4 + 0)
= -393 + 110.4 = -282.6 kJ
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