Reaction is spontaneous at all temperatures.
Explanation:
According to Gibb's equation:
= Gibbs free energy
= enthalpy change
= entropy change
T = temperature in Kelvin
= +ve, reaction is non spontaneous
= -ve, reaction is spontaneous
= 0, reaction is in equilibrium
Thus when = -ve (decrease in enthalpy)
= +ve (increase in entropy)
Thus Reaction is spontaneous at all temperatures.