The enthalpies of combustion of carbon and carbon monoxide are `-393.5` and `-283` kJ `mol^(-1)` respectively. The enthaly of formation of carbon monoxide per mole is :

Options

A. 110.5 kJ
B. `-110.5` kJ
C. `-676.5 kJ`
D. `676.5 kJ

Answer

B

Explanation

`({:(C+O_(2)rarrCO_(2)" "Delta H=-393.5" kJ ...(i)"),(CO+(1)/(2)O_(2) rarr 2CO_(2)" "Delta H =-283" kJ ...(ii)"):})/("(i) - (ii) : "C+(1)/(2)O_(2)rarrCO" "Delta H=-110.5" kJ")`