Give that `C_(s) +O_(2_(g))to CO_(2_((g))), Delta H^(0)=-xkJ`
`2CO_((g))+O_(2_((g)))to 2CO_(2_((g))), Delta H^(0)=-ykJ`.

Given: 2C_((s)) + 2O_(2(g)) to 2CO_(2(g)), Delta H_1 =-767 kJ …(i) H_(2(g)) + 1/2 O_(2(g)) to H_2 O_((l)), Delta H_2 =-266 kJ …(ii) C_2 H_(2(g)) + 5/2 O_2 to 2CO_(2(g)) + H_2 O_((l)) , Delta H_3 =-1290 kJ ….(iii) Heat of formation of acetylene 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 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