Combustion of 1 mole of benzene is expressed at C6H6(1) + ( ) ( ) ( ) 2 15 O g CO g 3H O 1 . → + The — JEE Mains Chemistry Past Papers Chemistry Question

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Combustion of 1 mole of benzene is expressed at C6H6(1) + ( ) ( ) ( ) 2 15 O g CO g 3H O 1 . → + The standard enthalpy of combustion of 2 mol of benzene is – 'x' kJ. x = ______. (1) standard Enthalpy of formation of 1 mol of C6H6(1), for the reaction 6C(graphite) + 3H2(g) → C6H6(1) is 48.5 kJ mol –1. (2) Standard Enthalpy of formation of 1 mol of CO2(g), for the reaction C(graphite) + O2(g) → CO2(g) is –393.5 kJ mol –1. (3) Standard and Enthalpy of formation of 1 mol of H2O(1), for the reaction H2(g) + ( ) 1 O g → H2O(1) is –286 kJ mol –1.