Which of the following equations has/have enthalpy changes equal to `DeltaH_(comb)C`?
I. `C(s)+O_(2)(g)toCO_(2)(g)`
II. `C(s)+(1)/(2)O_(2)(g)toCO(g)`
III. `CO(g)+(1)/(2)O_(2)(g)toCO_(2)(g)`

Determine Delta U^(@) at 300K for the following reaction using the listed enthalpies of reaction : 4CO(g)+8H_(2)(g)to3CH_(4)(g)+CO_(2)(g)+2H_(2)O(l) C("graphite")+(1)/(2)O_(2)(g)to CO(g), DeltaH_(1)^(@)=-110.5KJ CO(g)(1)/(2)O_(2)(g)toCO_(2)(g), DeltaH_(2)^(@)=-282.9KJ H_(2)(g)+(1)/(2)O_(2)(g)to H_(2)O(l), DeltaH_(3)^(@)=-285.8KJ C("graphite")+2H_(2)(g)to CH_(4)(g), DeltaH_(4)^(@)=-74.8KJ

Determine Delta U^(@) at 300K for the following reaction using the listed enthalpies of reaction : 4CO(g)+8H_(2)(g)to3CH_(4)(g)+CO_(2)(g)+2H_(2)O(l) C("graphite")+(1)/(2)O_(2)(g)to CO(g), DeltaH_(1)^(@)=-110.5KJ CO(g)(1)/(2)O_(2)(g)toCO_(2)(g), DeltaH_(2)^(@)=-282.9KJ H_(2)(g)+(1)/(2)O_(2)(g)to H_(2)O(l), DeltaH_(3)^(@)=-285.8KJ C("graphite")+2H_(2)(g)to CH_(4)(g), DeltaH_(4)^(@)=-74.8KJ

Calcutate Delta H in kJ for the following reaction C(g)+O_(2)(g) Given that , H_(2)O(g)+C_(g)toCO(g)+H_(2)(g),""""" DeltaH=+131kJ CO(g)+(1)/(2)O_(2)(g)toCO_(2)(g) """"'DeltaH=-282kJ H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(g) """""DeltaH=-242kJ

The free energy change for the following reactions are given below C_(2)H_(2)(g)+(5)/(2)O_(2)(g)to2CO_(2)(g)+H_(2)O(l),DeltaG^(@)=-1234kJ C(s)+O_(2)(g)toCO_(2)(g),DeltaG^(@)=-394kJ H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(l),DeltaG^(@)=-273kJ What is the standard free energy change for the reaction H_(2)(g)+2C(s)toC_(2)H_(2)(g) :-

The free energy change for the following reactions are given below C_(2)H_(2)(g)+(5)/(2)O_(2)(g)to2CO_(2)(g)+H_(2)O(l),DeltaG^(@)=-1234kJ C(s)+O_(2)(g)toCO_(2)(g),DeltaG^(@)=-394kJ H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(l),DeltaG^(@)=-273kJ What is the standard free energy change for the reaction H_(2)(g)+2C(s)toC_(2)H_(2)(g) :-

Calculate the heat of formation of methane in kcalmol^(-1) using the following thermo chemical reactions C(s)+O_(2)toCO_(2)(g) , DeltaH=-94.2 kcal mol^(-1) H_(2)(g)+1/2O_(2)(g)toH_(2)O(l) , DeltaH=-68.3 kcal mol^(-1) CH_(4)(g)+2O_(2)(g)toCO_(2)(g)+2H_(2)O(l) , DeltaH=-210.8 kcal mol^(-1)

Calculate the heat of formation of methane in kcalmol^(-1) using the following thermo chemical reactions C(s)+O_(2)toCO_(2)(g) , DeltaH=-94.2 kcal mol^(-1) H_(2)(g)+1/2O_(2)(g)toH_(2)O(l) , DeltaH=-68.3 kcal mol^(-1) CH_(4)(g)+2O_(2)(g)toCO_(2)(g)+2H_(2)O(l) , DeltaH=-210.8 kcal mol^(-1)

Calcutate enthalpy for formation of ethylene form the following data (I) C_((graphtie))+O _(2)(g)toCO_(2)(g), """""Delta=-393.5kJ (II) H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(l), """" DeltaH=-286.2kJ (III) C_(2)H_(4)(g)+3O_(2)(g)to2CO_(2)(g)+2H_(2)O(l)"""""DeltaH=-1410.8kJ