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The vibrational wavenumbers of the following molecules in their v 0 state are: HCI 2885 cm', DCI 1990 cm', D2 2990 cm, and HD

The vibrational wavenumbers of the following molecules in their v" 0 state are: HCI 2885 cm', DCI 1990 cm', D2 2990 cm, and HD 3627 cm. Calculate the energy change, in kJmol' of the reaction: HCI + D2 DCI + HD, and determine whether the energy is liberated or absorbed. Hint: Consider the zero- point energies of the four molecules concerned.

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