The enthalpy of dissociation of gaseous methane and ethane are 400 and `670kJmol^(-1)` respectively. Determine the amount of energy needed to break one mole of "C" bonds.
A) 270kJ
B) 70kJ
C) 200kJ
D) 240kJ

the heat of atomization of methane and ethane are 360 KJ/mol and 620 KJ/mol , respectively . The longest Wavelength of light capable of breaking . The c-c bond is : (Avogadro number =6.02xx10^(23),h=6.62xx10^(-34)Js)

The bond energies of C=C and C-C at 298 K are 590 and 331 kJ mol^(-1) , respectively. The enthalpy of polymerisation per mole of ethaylene is

The bond enthalpies of H-H and Cl-Cl are 430 and 242 kJ mol^(-1) , respectively. If DeltaH_(f) (HCl) is -91 kJmol^(-1) the bond enthalpy of HCl would be

The enthalpy of atomisation for the reaction CH_(4) (g) rarr C (g) + 4H (g) " is " 1665 kJ mol^(-1) . What is the bond energy of C - H bond ?

The electron gain enthalpy (in kJ/mole) of F, O, N and C respectively are :

If the enthalpy of combustion of C (graphite) is -393.3kJ mol^(-1) , then for producing 39.3kJ of heat the amount of carbon required is

Heat of formation of 2 moles of NH_(3)(g) " is" -90 kJ l bond energies of H-H and N-H bonds are 435 kJ and 390 kJ mol^(-1) respectively. The value of the bond energy of N -= N is ?

The standard molar enthalpies of formation of cyclohexane and benzene at 25^@C are - 156 and +49 KJ mol^(-1) respectively. The standard enthalpy of hydrogenation of cyclo hexene at 25^@C " is" -116 "KJ mol" ^(-1) . Use this data to estimate the magnitude of the resonance energy of benzene.

The first and second ionisation enthalpies of a metal are 496 and 4560 KJ mol ^(-1) , respectively. How many moles of HCI and H_2SO_4 Respectively , will be needed to react completely with 1 mole of the metal of the metal hydroxide ?

The enthalpy of combustion at 25^(@)C of H_(2)(g) , cyclohexane and cyclohexene are -241, 3920 and -3717 kJ "mole"^(-1) respectively. The heat of hydrogenation of cyclohexene is ( Kcal/mole) approximate integer: