Air contain 99%N_(2) and O_(2) gases. Then why don't they combine to form NO under the standard conditions? Given that the standard free energy of formation ofNO(g) is 86.7 kJ mol^(-1) .

Air contain 99%N_(2) and O_(2) gases. Then why don't they combine to f

1.	Air contain 99%N_(2) and O_(2) gases. Then why don't they combine to form NO under the standard conditions? Given that the standard free energy of formation ofNO(g) is 86.7 kJ mol^(-1) .
Answer» Solution :STANDARD free energy of FORMATION `( Delta_(f)G^(@))` for the REACTION `(1)/(2)N_(2)(g)+(1)/(2)O_(2)(g) rarr NO(g0` is POSITIVE ( equal to `+86.7 kJ mol^(-1))`. Hence, the reaction isnon-spontaneous under the standard CONDITIONS.