`N_(2)(g) +2O_(2)(g) rarr 2NO_(2)(g) +X kJ`
`2NO(g)+O_(2)(g) rarr 2NO_(g) +Y kJ`
The ethalpy of formation of `NO` 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))+2O_(2(g)) rarr 2NO_(2) +X kJ 2NO_((g))+O_(2(g)) rarr 2NO_(2(g))+Y kJ The enthalpy of formation of NO is

N_(2(g))+2O_(2(g)) rarr 2NO_(2) +X kJ 2NO_((g))+O_(2(g)) rarr 2NO_(2(g))+Y kJ The enthalpy of formation of NO is

N_(2(g)) + 2O_(2(g)) rarr 2NO_(2) + xkJ, 2NO_((g)) + O_(2(g)) rarr 2NO_(2(g)) + ykJ . The enthalpy of formation of NO is

N_(2(g))+O_(2(g))rarr 2NO_(2(g))-Q is ……………..