150 800 1.0 Critical State 900 050 1000 1050 1100 Enthalpy, Btu per Lb. 1150 1200 1250 1300 1400 1450 17106 1350 1.1 1.3 1.4 1.5 Entropy 1500 1600 1.5 1550 910 5 1200 150 Entropy 1.6 1.8 1.9 2.0 2.1 2.2 1600 850 1050 7 1550 1000 Constant Temperature, deg. 950% 1500 1001 900 Temperature, 1950 850 1450 800 750 1400 1350 1300 450 400 1250 1200 200 1150 150 1000 1050 Copyright, 1940, by Frank O. Ellenwood, William N. Barnard and Charles O. Mackey a) Trace constant property lines that pass through the critical point which is the top of the vapor dome -use blue for constant temperature -red for constant pressure -green for constant enthalpy -violet for constant entropy b) Property values at the critical point temperature- ? Pressure- ? Enthalpy- ? Entropy- ? 1100 Enthalpy, Btu per Lb.