Bond enthalpies of H-H, Cl-Cl and H-Cl bonds are `434 kj mol^(-1)`, `242 kj mol^(-1)` and `431 kj mol^(-1)`, respectively. Enthalpy of formation of HCl is

Given thebond energiesof N=N, H-H,and N-H bonds are 945, 436 and 391 kj mol^(-1) respectively. The enthalpy of the reaction N_(2(g))+3H_(2(g)) rarr 2NH_(3(g)) is

The combustion enthalpies of carbon, hydrogen and methane are -395.5 "kJ" mol^-1, -285.8 "kJ" mol^-1 "and" -890.4 kJ mol^-1 "respectively at " 25^@C . The value of standard formation enthalpy of methane at that temperature is ____________ .

The enthalpies of combustion of carbon and carbon monoxide are -393.5 and -283 kJ mol^(-1) respectively. The enthaly of formation of carbon monoxide per mole is :

The bond dissodation energies of gaseous H_2, Cl_2 and HCl are 104, 58 and 103kcal respectively.The enthalpy of formation of HCI gas would be

The values of DeltaH and Delta S of a certain reaction are -400 kJ mol^-1 and -20 kJ mol^-1 K^-1 respectively. The temperature below which the reaction is spontaneous is _________.

Standard enthalpy and standard entropy changes for the oxidation of ammonia at 298 K are -382.64 kJ mol^(-1) and -145.6 JK^(-1)mol^(-1) respectively. Standard Gibbs energy change for the same reaction at 298 K is

The molar ionic conductances at infinite dilution of Mg^(2+) and Cl^- are 106.1 and 76.3 ohm^(-1) cm^2 mol^(-1) respectively. The molar conductance of solution of MgCl_2 at infinite dilution will be