Something seems funny in the Cengel & Boles Thermo text, 6th edition.
The entropy chapter defines relative
pressure Pr = exp(s0/R), where s0 is the component of entropy due to temperature. But the values for Pr given in the ideal gas table for air (A-17) are 1/275.1 of those calculated from that definition.
It also defines relative specific volume vr=T/Pr, which would have units of kelvins, but the caption of the table claims that this is nondimensional like Pr.
Was gibt?
rj
