The vibrational energy spacings for the hydrogen halides are :

HF: 3958.4 cm-1

H35Cl: 2885.6 cm-1

HBr: 2559.3 cm-1

HI: 2230.3 cm-1

Calculate the force constants. Do you notice any trends in the force constants? Suggest an

explanation for the trend or the lack of a trend.

so F=-kx but since there is no displacement, is there some other equation

x(t) = x_{o} sin(omega"t) with " omega=square root(k/m)= 2Piv

is this the equation to use, were omega is the frequency.