6.2
d.p = 6.9 MPa, saturated vapor
6.2 Using the appropriate table, determine the change in specific entropy between the specified states, in kJ/kgK:
a. water, P = 6.9 MPa, T = 427°C, p = 6.9 MPa, T = 38°C
b. Refrigerant 134a, h = 111.43 kJ/kg, s = -40°C, saturated vapor at p = 276 kPa
c. air as an ideal gas, T = 4°C, P = 2 bar, T = 216°C, p = 1 bar
d. carbon dioxide as an ideal gas, T = 438°C, P = 1 bar, T = 25°C, P = 3.04 bar.
kJ/kg-K.