# Dieterici Equation of State

Dieterici Equation of State

This Demonstration plots a series of isotherms for a number of real gases using the Dieterici equation of state. The values of , , and (critical temperature, pressure, and volume), , (attractive and repulsive parameters), and (compressibility factor) are calculated and displayed. The Demonstration uses Dieterici's equation for , , the critical constants =a/4Rb, =a/4, =2b, and the compressibility factor . The ideal gas equation is .

T

c

P

c

V

c

a

b

Z

n=1

P(V-b)=RT

-a/RTV

e

T

c

P

c

2

b

2

e

V

c

Z=

V

V-b

-a/VRT

e

PV=nRT