Answer:
The value of ΔS° for the catalytic hydrogenation of ethene to ethane is -120,48 J K⁻¹ mol⁻¹.
Explanation:
The ΔS° of a reaction is:
ΔS°= S (products) - S (reactants)
The only product is ethane (with S°= 229,5 J K⁻¹ mol⁻¹).
Reactants are ethene and H₂ (g) (with S°= 219,4 J K⁻¹ mol⁻¹ and S°= 130,58 J K⁻¹ mol⁻¹, respectively)
So, ΔS° is:
ΔS°= 229,5 J K⁻¹ mol⁻¹ - (219,4 J K⁻¹ mol⁻¹ + 130,58 J K⁻¹ mol⁻¹)
ΔS°= -120,48 J K⁻¹ mol⁻¹
I hope it helps!
