Sketch the \(P-V\) phase diagram for helium-4 using the sketch of the \(P-T\) phase diagram in Figure 4.3.

Transcribed Image Text:

Ps P S superfluid Pe T To T FIGURE 4.3 Sketch of the P-T phase diagram for helium-4. The letters S, L, and V denote solid, liquid, and vapor phases. The critical point is T = 5.19K and P = 227kPa = 2.24 atm. The solid-liquid coexistence curve starts at Ps = 2.5 MPa = 25 atm at T = OK and does not intersect the liquid-vapor coexistence curve. The x-line is the continuous phase transition between the normal liquid and the superfluid phase. The superfluid phase transition temperature at the liquid-vapor coexistence line is T = 2.18 K.