For the reaction c(s)+h2o(g)→co2(g)+h2(g) δh∘=131.3kj/mol and δs∘=127.6j/k⋅mol at 298k. at temperatures greater than ∘c this reaction is spontaneous under standard conditions.

Answer : At temperatures greater than this reaction is spontaneous under standard conditions.

Explanation : Given,

= 131.3 KJ/mole = 131300 J/mole

= 127.6 J/mole.K

Gibbs–Helmholtz equation is :

As per question the reaction is spontaneous that means the value of is negative or we can say that the value of is less than zero.

The above expression will be:

Now put all the given values in this expression, we get :

Therefore, at temperatures greater than this reaction is spontaneous under standard conditions.