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B
B
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C
C
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D
D
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E
E
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Solution
The correct option is BB The ΔH of the reaction to form CO from C+O2 is B (-110.5 kJ). B corresponds to transformation C(s)+12O2(g)→CO(g)+12O2(g) If we cancel 12O2(g) on both sides of the equation, we get, C(s)→CO(g)