Dear Vikaskumar Gupta,

According to Myers and Monson, adsorption may be decomposed into a two-step process:

01. Isothermal, isobaric immersion of clean adsorbent in the compressed gas & 02. Isothermal compression of the gas.

The enthalpy differences can then be written as

ΔH = ΔHimm + ΔHcomp

where,

ΔHimm is the enthalpy changes associated with isothermal immersion of the adsorbent from its clean state in vacuo (unadsorbed) to the equilibrium pressure of the bulk fluid, and

ΔHcomp is the enthalpy changes associated with isothermal compression of the outside gas from its perfect gas reference state to the equilibrium pressure of the bulk fluid.

For better understanding you can also go through following research articles/ links:

01. https://www.sciencedirect.com/topics/chemistry/enthalpy-of-adsorption

02. https://www.youtube.com/watch?v=4USNG8aZGXs

I hope I have answered your question.

With Best Wishes,

Samir G. Pandya

If you have P and V data with you it can be fitted in Freundlich Langmuir equation. From there you will get some constants which will be fitted in variant of Clausius Clapeyron Equation. The final data will be your heat of adsorption/ enthalpy of adsorption (DeltaHAds).

My recent article can be useful:Article Opportunities and constraints of using the innovative adsorb...

The starting point of thermodynamic logic is: 1) opposing perpetual motion. 2) The irreversibility of dynamics. Let's look at how to get Carnot efficiency = 1-T1/T2.

1.1 There are many kinds of type 2 perpetual motors, each of which is a natural phenomenon.

A) Machine A: against the irreversibility of thermodynamics (diffusion, heat conduction, friction, etc) - dynamics;

B) Machine B: Utilizing the Difference of Carnot Efficiency (Reversible Thermodynamics) - Thermodynamics

1.2 A and B belong to different disciplines. There is a parallel relationship between them and there is no logical mutual inevitability.

1.3. Logic of the Second Law of Thermodynamics:

Experience induction, deny that A machine==> B machine can not be manufactured==> All material Kano efficiency: 1-T1/T2.

1.4 The logic of the second law of thermodynamics violates the physical logic that A and B cannot be inferred from each other.

1.5 The second law of thermodynamics elevates the "irreversibility", which is in fact only a kinetic experience.

📷 Detailed discussion can be found in the following figure.

1. The second law of thermodynamics loses the ability of quantitative prediction.

2. Data processing method of law 2 of thermodynamics violates scientific discipline: modifying experimental data to satisfy theory

See the picture for details.

3. The second law of thermodynamics can only be called science if it reaches the same quantitative prediction ability as Newton's second law, otherwise it is pseudoscience.

4.Unfortunately, all the charts of enthalpy and entropy are organized in this way.

Comparison of New and Old Thermodynamics

1. Logic of the Second Law of Thermodynamics: Subjectivism, Logical Jump, Interdisciplinary Argumentation.

2. New thermodynamics pursues universality, two theoretical cornerstones:

2.1 Boltzmann formula: ro=A*exp(-Mgh/RT) - Isotope centrifugal separation experiments show that it is suitable for gases and liquids.

2.2. Hydrostatic equilibrium: applicable to gases and liquids.

3. The second and third sonic virial coefficients of R143a derived from the new thermodynamics are in agreement with the experimental results.

3.1. The third velocity Virial coefficient derived is in agreement with the experimental data, which shows that the theory is still correct when the critical density is reached.

4. See Appendix Pictures and Documents for details.