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Chemistry Question on Chemical Kinetics

Select the correct option:
2CO(g)+O2(g)→2CO2(g);ΔH=−xKJ/mol2CO (g) + O_2 (g) → 2CO_2 (g) ; ΔH = -x KJ/mol
C(graphite)+O2(g)→CO2(g);AH=−yKJ/molC (graphite) + O_2(g) → CO_2 (g) ; AH = -y KJ/mol
Then AH for, C(graphite)+12O2(g)→CO(g):C(graphite) + \frac{1}{2} O_2 (g) → CO (g):

A

x−y2x-\frac{y}{2}

B

x−2y2x-\frac{2y}{2}

C

x+2y2x+\frac{2y}{2}

D

x−y2\frac{x-y}{2}

Answer

x−2y2x-\frac{2y}{2}

Explanation

Solution

The correct option is (B): x−2y2x-\frac{2y}{2}