申論題

5. (20%) The two gases H₂(g) and D₂(g) (Deuterium molecule) are mixed in equal molar amounts. The mixture tends to react to form HD(g) (g) according to the isotope exchange reaction H₂(g) + D₂(g)⇌2HOD(g).

(a) (2%) H-H, H-D, and D-D bonds have about the same bond enthalpy. Evaluate A,H°.