Argon gas is compressed from 150 kPa nd 25°C to a pressure of 700 kPa adiabatically. The lowest temperature of argon after compression is
A)25°C
B)46°C
C)117°C
D)279°C
E)472°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. 
k=1.667
P1=150 "kPa"
T1=25 "C"
P2=700 "kPa"
"s2=s1"
"The exit temperature will be lowest for isentropic compression," 
T2=(T1+273)*(P2/P1)^((k-1)/k) "K"
T2_C= T2-273 "C"
"Some Wrong Solutions with Common Mistakes:"
W1_T2=T1 "Assuming temperature remains constant"
W2_T2=T1*(P2/P1)^((k-1)/k) "Using C instead of K"
W3_T2=(T1+273)*(P2/P1)-273 "Assuming T is proportional to P"
W4_T2=T1*(P2/P1) "Assuming T is proportional to P, using C"

Argon Gas Is Compressed from 150 KPa Nd 25°C to a Pressure