2CO(g) + O2(g) → 2CO2(g) Given that ΔH[CO]is -110.4 kJmol-1 and ΔH[CO2] is -393.0 kJmol-1,…

2CO(g) + O2(g) → 2CO2(g) Given that ΔH[CO]is -110.4 kJmol-1 and ΔH[CO2] is -393.0 kJmol-1,…

2CO(g) + O2(g) → 2CO2(g) Given that ΔH[CO]is -110.4 kJmol-1 and ΔH[CO2] is -393.0 kJmol-1,…

A.
-503.7 kJ
B.
-282.6 kJ
C.
+282.6 kJ
D.
+503.7 kJ

Correct Answer: Option B
Explanation
Energy change (ΔH) = 2ΔHCO2 – (2ΔHCO + ΔHO)
= 7x – 393 – (7 * 110.4 + 0)
= -393 + 110.4 = -282.6 kJ

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