Carbon Dioxide: Pressure - Enthalpy Diagram

Mel

ting

Line

-40

-40

o F -20

-20

t = 0

oF

0

20

20

40

40

60

60

80

80

100

100

120

120

140

140

160

160

180

180

200

200

250

250

300

300

350

o F

350

400

400

450

500

-.55

0

-.52

5

Ent

ropy

= -

0.50

0 B

tu/lb

,oF

-.47

5

-.45

0 -.42

5 -.4

00 -.3

75

-0.3

50 -.32

5

-.300 -.2

75

-.250 -0

.225

-0.2

00

-.125

-.175

-.150

-.075

-.100

-.050

-0.025

Entro

py = 0

Btu/l

b,o F

Triple Point (75.122 psia, -69.804 oF)

Sub

limat

ion

Line

75

70

65 60

55 50 45 40 35 Dens

ity = 30 lb/ft

3

25

20

15

10

5.0 lb/ft

3

4.0

3.0

2.0

1.5

1.0

Density = 0.5 lb/ft

3

10

100

1,000

10,000

-200 -180 -160 -140 -120 -100 -80 -60 -40 -20 0 20 40 60 80

Enthalpy, Btu/lb

Pre

ssu

re, P

si

0.1

0.2

.3

0.4 0.50.6

0.7 0.8

0.9

Copyright 1999 ChemicaLogic Corporation

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Drawn with CO2TabTM

A Spreadsheet Add-in for the Thermodynamic and Transport Properties of Carbon Dioxide