In each case consider a fixed mass at rest and zero

Question

7.14 Determine the specific exergy, in Btu, of one pound mass of

(a) saturated liquid Refrigerant 134a at 25°F.

(b) saturated vapor Refrigerant 134a at 140°F.

(c) Refrigerant 134a at 60°F, 20 lbf/in.2

(d) Refrigerant 134a at 60°F, 10 lbf/in.2

In each case, consider a fixed mass at rest and zero elevation relative to an exergy reference environment for which T0 5 60°F, p0 5 15 lbf/in.2