Question

hello please help me with this ...

Answer 1

a )  is the answer  Hope you get it right

Answer 2

For a reaction to be spontaneous ∆G must be negative.

That is ∆G<0 is a must condition.

We know, ∆G = ∆H - T ∆S

∆G = 35500 - T( 83.6)

As ∆G is less than zero,
35500 - T (83.6) <0

T > 35500/83.6

T > 425K

Hope u get it.