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The enthalpies of combustion of carbon and carbon monoxide are $-393.5 $ and $-283\;kj \;mol^{-1}$ respectively . The enthalpy of formation of carbon monoxide per mole is

$\begin{array}{1 1}(A)\;110.5\;kJ \\(B)\;-110.5\;kJ \\(C)\;-676.5\;kJ \\ (D)\;676.5\;kJ \end{array} $
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The enthalpy of formation of carbon monoxide per mole is $-110.5\;kJ$
Hence B is the correct answer.
answered Apr 11, 2014 by meena.p
 

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