Answer : This reaction occur spontaneously at temperature above in kelvins is, 340 K
Explanation : Given,
= 17 KJ/mole = 17000 J/mole
= 50 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, this reaction occur spontaneously at temperature above in kelvins is, 340 K