The heats of combustion of carbon and carbon monoxide are -393.5 and - 283.5 kJ mol^(-1) respectively. The heat of formation ( in kJ ) of carbon monoxideper mole is :

The heats of combustion of carbon and carbon monoxide are -393.5 and -

1.	The heats of combustion of carbon and carbon monoxide are -393.5 and - 283.5 kJ mol^(-1) respectively. The heat of formation ( in kJ ) of carbon monoxideper mole is :
Answer» `676.5` ` - 676.5` `-110.5 ` `110.5` Solution :GIVEN`: C(s) + O_(2)(g) rarr CO_(2)(g),DeltaH = -393.5 kJ MOL^(-1)` …(i) `CO(g) + (1)/(2) O_(2)(g)rarr CO_(2)(g), DeltaH= - 283.5 kJ mol^(-1)`…(II) Aim `: C(s) + (1)/(2)O_(2)(g)rarr CO(g)` Eqn. (i) -Eqn. (ii) GIVES required eqn. with `DeltaH =- 393.5 - ( - 283.5) kJ = -110 kJ`