16.38. Calculate the equilibrium constant at 25C for the reaction H2+D2=2HD. It may be assumed that the equilibrium distance and force constant k are the same for all three molecular species, so that the additional vibrational frequencies required may be calculated from 2=(k/)1/2. Because of the zero-point vibration, De0 for this reaction is given by De0=21NAh(2nHDnH2nD2) 16.38. Calculate the equilibrium constant at 25C for the reaction H2+D2=2HD. It may be assumed that the equilibrium distance and force constant k are the same for all three molecular species, so that the additional vibrational frequencies required may be calculated from 2=(k/)1/2. Because of the zero-point vibration, De0 for this reaction is given by De0=21NAh(2nHDnH2nD2)