Thermochemistry Q.?

Question

One of the components of polluted is NO. It is formed in the high-temperature environment of internal combustion engines by the following reaction:
N2(g) + O2(g) ----> 2NO(g) delta H=180 kJ

Q: Why are high temperatures needed to convert N2 and O2 to NO?

Answer 1

Very high activation energy, which is largely due to the triple bond in N2.

Also, you will see that the reaction is endothermic. Endothermic reactions are favoured by high temperatures.