Question

For the reaction, \[\ce{A_{(s)} + 2B_{(g)} -> 5C_{(s)} + D_{(l)}}\], ∆H and ∆U are related as ____________.

विकल्प

• ∆H = ∆U

• ∆H = ∆U + 2 RT

• ∆H = ∆U + RT

• ∆H = ∆U − 2 RT

Answer 1

For the reaction, \[\ce{A_{(s)} + 2B_{(g)} -> 5C_{(s)} + D_{(l)}}\], ∆H and ∆U are related as ∆H = ∆U − 2 RT.

Explanation:

\[\ce{A_{(s)} + 2B_{(g)} -> 5C_{(s)} + D_{(l)}}\]

∆n_g = 0 − 2 = −2;

∆H = ∆U + ∆n_gRT

∴ ∆H = ∆U + (−2) (RT)

∆H = ∆U − 2 RT