`C(s)+(1)/(2)O_(2)(g)to CO(g), Delta H =- 42` kJ/mole
`CO(g)+(1)/(2)O_(2)(g)to CO_(2)(g) , Delta H =-24` kJ/mole
The heat of formation of `CO_(2)` is

The equations representing the combustion of carbon and carbon monoxide are : C(s) + O_(2)(g) to CO_(2)(g) DeltaH = -394 (kJ)/(mol) CO(s) + 1/2 O_(2)(g) to CO_(2)(g) DeltaH = -284.5 (kJ)/(mol) the heat of formation of 1 mol of CO(g) is :

The DeltaH values for reactions of , C(s) + 1/2 O_2 (g) to CO(g) DeltaH =-100 KJ CO(g) + 1/2 O_2 (g) to CO_2 (g) DeltaH = 200 KJ The heat of reaction for C(s) + O_2 (g) to CO_2 (g) is

Given C_((s)) + O_(2(g)) rarr CO_(2(g)), Delta H = -395 kJ , S_((g)) + O_(2(g)) rarr SO_(2(g)) , Delta H = -295 kJ , CS_(2(l)) + 3O_(2(g)) rarr CO_(2(g)) + 2SO_(2(g)) , Delta H = -1110 kJ The heat of formation of CS_(2(l)) is

Given C_((s)) + O_(2(g)) rarr CO_(2(g)), Delta H = -395 kJ , S_((g)) + O_(2(g)) rarr SO_(2(g)) , Delta H = -295 kJ , CS_(2(l)) + 3O_(2(g)) rarr CO_(2(g)) + 2SO_(2(g)) , Delta H = -1110 kJ The heat of formation of CS_(2(l)) is

Given that : C(s)+O_(2)(g)to CO_(2)(g) , Delta H = -394 kJ and 2H_(2)(g)+O_(2)(g)to 2H_(2)O(l) , Delta H =- 568 kJ and C_(2)H_(5)OH(l)+3O_(2)(g)to 2CO_(2)(g)+3H_(2)O(l) , Delta H =- 1058 kJ/mole. Using the data, the heat of formation of ethanol is

Given that : C(s)+O_(2)(g)to CO_(2)(g) , Delta H = -394 kJ and 2H_(2)(g)+O_(2)(g)to 2H_(2)O(l) , Delta H =- 568 kJ and C_(2)H_(5)OH(l)+3O_(2)(g)to 2CO_(2)(g)+3H_(2)O(l) , Delta H =- 1058 kJ/mole. Using the data, the heat of formation of ethanol is

Given that 2C(s) + 2O_(2)(g) rarr 2CO_(2)(g) Delta H = -787 kJ H_(2)(g) + (1)/(2)O_(2)(g) rarr H_(2)O(l) Delta H = -286 kJ C_(2)H_(2)(g) + (2) (1)/(2) O_(2)(g) rarr 2CO_(2)(g) + H_(2)O(l) Delta H = -1301 kJ Heat of formation of acetylene is :

If C(s) + O_2(g) rarr CO_2(g), Delta H = X and CO(g) + 1/2 O_2(g)rarr CO_2(g) Delta H = Y then the heat of formation of COis-