An ideal gas in a cylinder is separated by a piston in such a way that the entropy of one part is S1 and that of the other part is S2. Given that S1 > S2. If the piston is removed then the total entropy of the system will be :
(1) S1 × S2
(2) S1 – S2
(3) \(\frac{S_1}{S_2}\)
(4) S1 + S2