Definition: Werther's law is a thermodynamic relation relating the enthalpy of fusion and the entropy of vaporization in a gas. It states that for an ideal gas, at constant pressure, the entropy of vaporization (Sv) increases with temperature (T). This relationship can be mathematically represented as: \[ S_{\text{Vapor}} = \frac{\hat{T} - T}{1 + \frac{\hat{T}^2}{3RT}} \] Where