Question

If For an isolated system∆U = 0
Then what will be ∆S?​

Answer 1

$\huge{\mathfrak{Answer :≈}}$

\ ⟹ The Changes in internal energy (∆U) for an isolated system is zero

So,

\ ⟹ it does not exchange any energy in any form with the surroundings.

\ ⟹ But , The entropy tends to increase in case of spontaneous reaction.

•°• , ∆S > 0 or positive.

Answer 2

$\huge\underline\mathfrak\red{HeYa\:MaTe}$

⚫For an isolated system, ∆U = 0

⚫ For a spontaneous process, total entropy change must be positive.

⚫For example, consider the diffusion of two gases A and B into each other in a closed container which is isolated from the surroundings.

Hence, ∆ S > 0 or positive