`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) ?

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

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 .

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.

At 25^(@)C , the standard reaction enthalpy for the reaction, 2C(graphite, s) +O_(2)(g)to2CO(g) is -221.0kJ. Does this enthalpy change indicate the standard enthalpy of formation of CO(g) ? If not, then what would be the value of the enthalpy of formation of CO(g) at 25^(@)C ?

At 25^(@) C, is the standard reaction enthalpy for the reaction 2H(g) +O(g)toH_(2)O(l) the same as the standard enthalpy of formation of H_(2)O(l) ?

N_2(g) + 3H_2(g) → 2 NH_3(g) . For the above reaction the correct statement is

N_2(g) + 2O_2 (g) rarr 2NO_2 (g) + X kJ 2NO (g) + O_2(g) rarr 2NO_2 (g) + Y kJ the enthalpy of.formation of NO is

N_2(g)+3H_2(g)=2NH_3(g) What is the rate of disappearance of N_2 and H_2 is the rate of formation be 0.56 mol L^-1 s^-1 . Show that infinite time required for completion of 1st order reaction.