Saturated Refrigerant-134a liquid at 0.8 MPa is throttled to a pressure of 0.12 MPa. The temperature of the refrigerant after throttling is
A)-14.6°C
B)-5.6°C
C)0°C
D)31.3°C
E)-22.4°C

Question

Quizplus · Accepted Answer

Solved by EES Software. Solutions can be verified by copying-and-pasting the following lines on a blank EES screen. 
P1=800 "kPa"
x1=0
P2=120 "kPa"
"Quality represents the percentage of water that evaporates:"
h1=ENTHALPY(R134a,x=x1,P=P1)
T2=TEMPERATURE(R134a,h=h1,P=P2)
"Some Wrong Solutions with Common Mistakes:"
W1_T2=TEMPERATURE(R134a,x=0,P=P1) "Taking the temperature to be the saturation temperature at P1"

Saturated Refrigerant-134a Liquid at 0