As you have seen, ozone is formed in the upper atmosphere through the reaction:
o(g) + o2(g) → o3(g)
data has shown that this is first order with respect to oxygen atoms and first order with respect to diatomic oxygen. write the rate law equation for this reaction.

it is the most commonly accepted one

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.