Air is compressed from 30°C and 4.2 L to a volume of 0.50 m³ in a reversible adiabatic manner. The air temperature after compression is A)30°C B)70°C C)437°C D)252°C E)635°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. 
fluid$='R134a'
rho1=density(Fluid$, P=100, x=0)
k=1.40
v1=4.2 "L"
T1=30 "C"
v2=0.50 "L"
"s2=s1"
"The exit temperature is determined from isentropic compression relation," 
T2=(T1+273)*(v1/v2)^(k-1) "K"
T2_C= T2-273 "C"
 
"Some Wrong Solutions with Common Mistakes:"
W1_T2=T1 "Assuming temperature remains constant"
W2_T2=T1*(v1/v2)^(k-1) "Using C instead of K"
W3_T2=(T1+273)*(v1/v2)-273 "Assuming T is proportional to v"
W4_T2=T1*(v1/v2) "Assuming T is proportional to v, using C"

Air Is Compressed from 30°C and 4