Question

Consider the following facts: Water freezes spontaneously at

Answer 1

Entropy (S) is a thermodynamic quantity astatefunction which is a measure of degree of randomness or disorder of molecules of system.

more the disorder higher is the entropy.

Hence it can be concluded that decrease in entropy results in orderness of the molecules.

and Entropy dereases with decrease in temperature.

so during the conversion of liquid water (with higher disorder ) into ice(with less disorder) there is decrease in entropy hence

For an isolated system like freezing of water below 273K if S_final>S_initial or change in entropy is positive.

thus for a isolated system the process is spontaneous.