Question

Relation between ΔH and ΔU for the reaction, \[\ce{2SO_{3(g)} -> 2SO_{2(g)} + O_{2(g)}}\] is _______.

Options

• ΔH + ΔU = RT

• ΔH + ΔU = - RT

• ΔH - ΔU = 2RT

• ΔH - ΔU = RT

Answer 1

Relation between ΔH and ΔU for the reaction, \[\ce{2SO_{3(g)} -> 2SO_{2(g)} + O_{2(g)}}\] is ΔH - ΔU = RT.

Explanation:

\[\ce{2SO_{3(g)} -> 2SO_{2(g)} + O_{2(g)}}\]

Δn = 3 - 2 = 1

Now, ΔH = ΔU + ΔnRT

∴ ΔH - ΔU = RT