Related Resources: thermodynamics

### Isentropic Pressure and Volume

Thermodynamics
Heat Transfer

Isentropic Relative Pressure and Relative Volume Functions

Where:

T = Temperature
vr = relative specific volume
Pr = relative pressure

Isentropic Relative Pressure and Relative Volume Functions

The relative pressure and relative volume are temperature functions calculated with two scaling constants A1, A2.

such that for an isentropic process (s1 = s2)

where the near equalities are for the constant heat capacity approximation.

 T [K] Pr vr 200 0.2703 493.47 220 0.3770 389.15 240 0.5109 313.27 260 0.6757 256.58 280 0.8756 213.26 290 0.9899 195.36 298.15 1.0907 182.29 300 1.1146 179.49 320 1.3972 152.73 340 1.7281 131.20 360 2.1123 113.65 380 2.5548 99.188 400 3.0612 87.137 420 3.6373 77.003 440 4.2892 68.409 460 5.0233 61.066 480 5.8466 54.748 500 6.7663 49.278 520 7.7900 44.514 540 8.9257 40.344 560 10.182 36.676 580 11.568 33.436 600 13.092 30.561 620 14.766 28.001 640 16.598 25.713 660 18.600 23.662 680 20.784 21.818 700 23.160 20.155

 T [K] Pr vr 700 23.160 20.155 720 25.742 18.652 740 28.542 17.289 760 31.573 16.052 780 34.851 14.925 800 38.388 13.897 850 48.468 11.695 900 60.520 9.9169 950 74.815 8.4677 1000 91.651 7.2760 1050 111.35 6.2885 1100 134.25 5.4641 1150 160.73 4.7714 1200 191.17 4.1859 1250 226.02 3.6880 1300 265.72 3.2626 1350 310.74 2.8971 1400 361.62 2.5817 1450 418.89 2.3083 1500 483.16 2.0703 1550 554.96 1.8625 1600 634.97 1.6804 1650 723.86 1.52007 1700 822.33 1.37858 1750 931.14 1.25330 1800 1051.05 1.14204 1850 1182.9 1.04294 1900 1327.5 0.95445

 T [K] Pr vr 1900 1327.5 0.95445 1950 1485.8 0.87521 2000 1658.6 0.80410 2050 1847.1 0.74012 2100 2052.1 0.68242 2150 2274.8 0.63027 2200 2516.2 0.58305 2250 2777.5 0.54020 2300 3059.9 0.50124 2350 3364.6 0.46576 2400 3693.0 0.43338 2450 4046.2 0.40378 2500 4425.8 0.37669 2550 4833.0 0.35185 2600 5269.5 0.32903 2650 5736.7 0.30805 2700 6236.2 0.28872 2750 6769.7 0.27089 2800 7338.7 0.25443 2850 7945.1 0.23921 2900 8590.7 0.22511 2950 9277.2 0.21205 3000 10007 0.19992