Question

Calculate the work done in oxidation of so_2(g) at 25°C if, \[\ce{2SO_{2(g)} + O2_{(g)} -> 2SO_{3(g)}}\], R = 8.314 J K⁻¹ mol⁻¹.

Answer 1

Given: \[\ce{\underset{(2 mol)}{2SO_{2(g)}} + \underset{(1 mol)}{O2_{(g)}} -> \underset{(2 mol)}{2SO_{3(g)}}}\]

Δn = 2 − 3 = − 1

Now, work done in above oxidation reaction is,

W = − ΔnRT

=  − (− 1) × 8. 314 × 298

= + 2477.5 J

∴ W = 2.4775 KJ