`Cl_2(g)rarr 2Cl(g) Delta H^@=242KJ mol^(-1)` what is its enthalpy of atomization?

N_2(g)+3H_2(g)rarr 2NH_3(g) Delta H_r^@=-92.4 KJ What is the standard enthalpy of formation of NH_3 ?

N_(2)(g)+3H_(2)(g)to2NH_(3)(g),Delta_(r)H^(0)=-92.4kJ*mol^(-1) What is the standard enthalpy of formation of NH_(3) ?

At 25^(@)C and 1 atm if the bond energy of Cl_(2)(g) is 242kJ*mol^(-1) , then the standard enthalpy of atomisation of chlorine at the same temperature+_____.

Given that H_2O(l) rarr H^+ (aq) + OH^- (aq), DeltaH = 57.32 kJ H_2 (g) + 1/2 O_2(g) rarr H_2O(l) , DeltaH = -286.02 kJ Then calculate the enthalpy of formation of OH^- at 25^@C .

Using the data provided calculate the multiple bond energy (KJ mol^(-)) of a C-=C bond in c_2H_2 consider the bond energy of a C-H bond is 350 KJ mol^(-1) 2C(s)+H_2(g)rarr C_2H_2(g), Delta H=225KJ mol^(-1) 2C(s)rarr2 C(g), Delta H=1410 KJ mol^(-1) H_2(g)rarr 2H(g), Delta H=330KJ mol^(-1)

Judge the spontaneity of the following reaction at 298 K temperature and at a particular pressure: Br_2(1) + Cl_2 (g) rarr 2BrCl (g) . Given : Delta H = 29.3 kJ mol^(-1) and Delta S = 104.1 JK^(-1) mol^(-1)

The bond dissociation energies of two O-H bond in water are: H_2O(g)rarr H(g)+OH(g), Delta H=497.8 KJ mol^(-1) OH(g)rarr H(g)+O(g), Delta H=428.5 KJ mol^(-1) bond energy of O-H bond is

Given (at 25^(@)C ): C(s, graphite) +(1)/(2)O_(2)(g)toCO(g),DeltaH^(0)=-110.5kJ*mol^(-1) (1)/(2)O_(2)(g)toO,DeltaH^(0)=+249.1kJ*mol^(-1) CO(g)toC(g)+O(g),DeltaH^(0)=1073.24kJ*mol^(-1) The standard enthalpy change for the process, C(s, graphite) toC(g) at 25^(@)C is-

Calculate the standard enthalpy of reaction at 25^@C temperature for the following reaction : C_6H_6(I) + frac 15/2 O_2 (g) rarr 6CO_2(g)+3H_2O(I) . Given: The standard enthalpy of formation of C_6H_6(I) , .CO_2(g) and H_2O(I) are 49.0kJ mol^-1 , -393.5 kJ mol^-1 and -285.8 kJ mol^-1 respectively.