. The definition of compressibility factor Z, Eq. (3.32), may be written in the more intu-itive form: Z \equiv \frac{V}{V(\text { ideal gas })} where both volumes are at the

same T and P. Recall that an ideal gas is a model sub-stance comprising particles with no intermolecular forces. Use the intuitive definitionof Z to argue that: (a) Intermolecular attractions promote values of Z< 1. (b) Intermolecular repulsions promote values of Z> 1. (c) A balance of attractions and repulsions implies that Z 1. (Note that an ideal gas is a special case for which there are no attractions or repulsions.)