Based on the generalized charts, the error involved in the enthalpy of CO₂ at 350 K and 9 MPa if it is assumed to be an ideal gas is A)0 B)20% C)55% D)30% E)70%

Question

Quizplus · Accepted Answer

Solved by EES Software. Solutions can be verified by copying-and-pasting the following lines on a blank EES screen. 
T=350 "K"
P=9000 "kPa"
Pcr=P_CRIT(CarbonDioxide)
Tcr=T_CRIT(CarbonDioxide) 
Tr=T/Tcr
Pr=P/Pcr
Z=COMPRESS(Tr, Pr)
hR=ENTHDEP(Tr, Pr)

Based on the Generalized Charts, the Error Involved in the Enthalpy