SAMPLE CALCULATION :

OBSERVATION TABLE - IN AIR AT  328K

  

 

Now we plot a graph between (x-x₀) and time/(x-x₀)

(x-x0) vs time/(x-x0) plot

 

Then for the data above we have the least square equation as :

y = 26.17x + 1159

From the graph slope S is = 2.617*10^7 sec/m^2

Operating temperature T = 328K

Vapor pressure or carbon tetrachloride can be obtained from the equation :

 

Where T is in K and vapor pressure is in Pascal.

For carbon tetrachloride : C₁=78.441 , C2=-6128.1 , C₃=-8.5766 , C₄=6.8465*10^(-6) , C₅=2

With these values of constants we have the vapor pressure to be 49512.55 pascal =49.512 kN/m²

Total pressure P = 101.32 kN/m²

Kilogram molecular volume of a gas = 22.4 m³ at 273.15 K

Molecular weight of carbon tetrachloride = 154 kg/mol

Density of carbon tetrachloride at 321K = 1540 kg/ m³

Total concentration

 

=.03716kmol/m^3

Concentration of carbon tetrachloride

 

=.01816 kmol/m³

 

 

= .0372kmol/m³

 

 

=.01902 kmol/m³

 

 

=.0271 kmol/m³

 

Diffusion Co-efficient

 

=7.67*10^(-6) m²/sec