To determine whether the reaction to form ozone (O3) from oxygen (O2) is spontaneous under standard conditions at 25°C, we need to consider the Gibbs free energy change (ΔrG) of the reaction. The relationship between ΔrH (enthalpy change) and ΔrG (Gibbs free energy change) is given by the equation:
ΔrG = ΔrH - TΔrS
Where: ΔrH is the enthalpy change T is the temperature in Kelvin ΔrS is the entropy change
Given that the enthalpy change (ΔrH) for the reaction is +95 kJ/mol O2, we still need information about the entropy change (ΔrS) to determine the spontaneity of the reaction at 25°C.
Unfortunately, the provided information does not include the entropy change, which is crucial to evaluate the spontaneity of the reaction. Both the enthalpy change and the entropy change play a role in determining whether a reaction is spontaneous or not.
Without knowing the value of ΔrS, it is not possible to determine the spontaneity of the reaction to form ozone from oxygen at 25°C.