# How is it possible that entropy of the universe has increased since big bang but temperature of the universe has decreased?

How is it possible that entropy of the universe has increased since the big bang, but the temperature of the universe has decreased?

I know that the increasing temperature of the system tends to increase in the entropy of the system thing tends to go higher entropic states.

Here System = Universe.

In statistical mechanics, entropy is an extensive property of a thermodynamic system. It is closely related to the number Ω of microscopic configurations (known as microstates) that are consistent with the macroscopic quantities that characterize the system (such as its volume, pressure and temperature). Entropy expresses the number $$Ω$$ of different configurations that a system defined by macroscopic variables could assume. Under the assumption that each microstate is equally probable, the entropy $$S$$ is the natural logarithm of the number of microstates, multiplied by the Boltzmann constant $$k_B$$. Formally (assuming equiprobable microstates),
$$S=k_BlnΩ$$