Question

2SO₂ (g)+ O₂ (g) → 2SO₃ (g)
(Classify the reaction according to work done by the system, on the system and no work done if pressure is constant)

Answer 1

The reaction can be classified with the help of the gas of the expansion or compression work. That will be:

Work = P * delta V

Here gases will do the work as per the external pressure that is applied to the volume.

Delta V = Final V – initial V

And the sign will depend on the value of delta V. hence, you can calculate the type.