On the relationship between internal energy and both the polarizability volume and the diamagnetic susceptibility

Using experimental enthalpies of formation, polarizability volumes and diam agnetic susceptibilities, a relationship has been set up between these thre e parameters. It has been found that the internal energy is a state functio n dependent on both the polarizability volume and the diamagnetic susceptib ility, or U(alpha, chi). This function has been identified by plotting the internal energy of formation difference versus the polarizability differenc e or the diamagnetic susceptibility difference. In addition, for the equati ons derived here it has been shown that the polarizability volume and the e nthalpy of formation of a set of linear alkanes can be written as a functio n of the number of carbon atoms the molecule contains.