Determine the compressibility factor for nitrogen gas at the following conditions:

(a) T = 298 K, P = 101 kPa
(b) T = 200 K, P = 10,000 kPa
(c) T = 600 K, P = 10,000 kPa
(d) T = 600 K, P = 50 kPa

What will be an ideal response?


For N2, the critical properties are Tc = 126 K; Pc 3,390 kPa
The compressibility charts will be used to find the compressibility factor for each combination of reduced pressure and reduced temperature.

(a) T = 298 K, P = 101 kPa: TR = T/Tc = 2.37 PR = P/Pc = 0.03
Z = 1.0

(b) T = 200 K, P = 10,000 kPa: TR = T/Tc = 1.59 PR = P/Pc = 2.95
Z = 0.85

(c) T = 600 K, P = 10,000 kPa: TR = T/Tc = 4.76 PR = P/Pc = 2.95
Z = 1.07

(d) T = 600 K, P = 50 kPa: TR = T/Tc = 4.76 PR = P/Pc = 0.015
Z = 1.0

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