The standard heat of formation `(Delta_(f)H_(298)^(0))` of ethane (in kJ/mol), if the heat of combustion of ethane, hydrogen and graphite are `-1560, -393.5` and `-286kJ/mol`, respectively is _______.

Calculate the resonance energy of isoprene (C_(5)H_(8)) from the data given. Standard Heats of combustion of isoprene, carbon and hydrogen are -3186, -393.5 , and -285.83 kJ mol^(-1) , respectively. Bond energies of C=C, C-C, C-H and H-H bonds are 615, 348, 413 and 435.8 kJ mol^(-1) respectively. Standard heat of sublimation of graphite is 718.3 kJ mol^(-1) .

Calculate the heat of the following reaction at 25^@C . C_2H_4(g) + H_2(g) to C_2H_6(g) The heats of combustion of ethylene, hydrogen and ethane are-1410 kJ, -286.2 kJ and -1560.6 kJ respectively at 25^@C .

Calculate the standard heat of formation of propane if its heat of combustion is -2220.2kj mol^(-1) . The heats of formation of CO_2(g) " and " H_2O(l) are -394 .12 and -286.31 kJ mol^(-1) respectively.

The standard heat of formation of carbon disulphide (l) given that standard heat of combustion of carbon (s), sulphur (s) and carbon disulphide (l) are -393.3, -293.72 and -1108.76 KJ mol^(-1) respectively is

Given standard enthalpy of formation of CO(-110 "KJ mol"^(-1)) and CO_(2)(-394 "KJ mol"^(-1)) . The heat of combustion when one mole of graphite burns is

The heats of combustion of carbon,hydrogen and acetylene are -394kJ, -286kJ and -1301kJ respectively. Calculate heat of formation of C_(2)H_(2)

The heat of combustion of H_(2)(g) at constant pressure and 300k is -280kJ mol^(-1) . What will be the heat of combustion at constant volume and at 300K ?

Calculate the standard heat of formation of carbon disulphide (l) . Given that the standard heats of combusion of carbon (s) , sulphur (s) and acrbon disulphide (l) are -390, 290.0 , and -1100.0kJ mol^(-1) . Respectively.

How much heat is evolved if 3.2 g of methane is burnt and if the heat of combustion of methane is -880" kJ mol"^(-1) ?

Calculate standard heat of formation of CS_(2) . Given that standard heat of combustion of C,S and CS_(2) are -393.3,-293.72 and -1108.76kJ mol^(-1) .