Find the missing properties and give the phase of the substance a. H2O s = 7.70 kJ/kg

Question:

Find the missing properties and give the phase of the substance
a. H2O s = 7.70 kJ/kg K, P = 25 kPa h = ? T = ? x = ?
b. H2O u = 3400 kJ/kg, P = 10 MPa T = ? x = ? s = ?
c. R-12 T = 0°C, P = 200 kPa s = ? x = ?
d. R-134a T = −10°C, x = 0.45 v = ? s = ?
e. NH3 T = 20°C, s = 5.50 kJ/kg K u = ? x = ?