As suggested by Fig. 3.1, the slope of the sublimation curve at the triple point is  generally greater than that of the vaporization curve at the same state. Rationalize this observation. Note that triple-point pressures are usually low; hence assume for this  exercise that Δ Z^sv ≈ Δ Z^lv ≈ 1.

Fig. 3.1

Transcribed Image Text:

Fluid reglon Liquid region Fusion curve Vaportzation curve Figure 3.1: PT diagram for a pure substance. Solid region Gas region Triple Vapor region point Sublimation curve Temperature Pressure