The standard heat of combustion of graphite carbon is `-393.5 kJ mol^(-1)`. The standard enthalpy of `CO_(2)` is

The standard enthalpies of formation of H_(2)O(l) and CO_(2)(g) are respectively -286" kJ mol"^(-1) and -394" kJ mol"^(-1) . If the standard heat of combustion of CH_(4)(g)" is "-891" kJ mol"^(-1) , then the standard enthalpy of formation of CH_(4)(g) is

The heat of combustion of graphite and carbon monoxide respectively are 393.5 kJ mol^(-1) and 283 kJ mol^(-1) . Thus, heat of formation of carbon monoxide in kJ mol^(-1) is

The enthalpy of combustion of carbon to CO_(2)(g) is -393.5 kJ mol^(-1) . The heat released upon the formation of 35.2 g of CO_(2) from carbon and dioxygen is :

Calculate the heat of formation of benzene given that the standard heat of combustion of benzene is - 3266 kJ and standard heat of formation of CO_(2)(g) and H_(2)O(l) are - 393.1 kJ and - 286 kJ respectively.