Question

What are the heat capacity constant (Cp) values for C₁₀H₈ ,O₂ , C₈H₄O₃ ,CO₂ and H₂O at 600 K according to the Antoine equation?

Answer 1

The Antoine equation is a class of semi-empirical correlation describing the relation between vapor pressure and temperature for pure components .

p=10^{A-   B/C+T}

Where p is the vapor pressure ,T is temperature and A,B and C are component-specific constants

So,Vapor pressure of C10H4O3 ,O2 ,Phthalic anhydride ,co2 ,H20 at 600k Temperature

to be calculated using the above formula Antoine equation .

                                            Vapor pressure

C10H4O3                             7,5 kpa (600k)

O2                                       130 pa

C8H4O3                               0.0225 mmHg

CO2                                     86 MPa

H20                                      303 kpa

Step 2

Plotting saturation pressure as a function of temperature Then getting the value of heat capacity constant cp at specific pressure and 600 k .

Plotting X axis Temperature

plotting Y axis vapor pressure

Heat capacity constant Cp value

C10H8(naphthalene) 165.72 j/mol-k

O2                     0.22 Btu/lbmoF

C8H4O3(phthalic anhydride)     226.20( j/mol*k)

CO2                       0.21 Btu/lbmoF

H2O                  75.291 JK^-1 mol^-1