Freundlich isotherm explains the behaviour of
adsorption

Options

A. Correctly
B. Approximately
C. Wrongly
D. At very high temperature only

Answer

To solve the question regarding the Freundlich isotherm and its explanation of adsorption behavior, we can break it down into the following steps:

### Step 1: Understand the Freundlich Isotherm
The Freundlich isotherm is an empirical relationship that describes how the amount of gas adsorbed onto a solid surface varies with the pressure of the gas. It is represented by the equation:

\[ x/m = k \cdot P^{1/n} \]

Where:
- \( x/m \) is the amount of gas adsorbed per unit mass of the adsorbent,
- \( P \) is the pressure of the gas,
- \( k \) and \( n \) are constants specific to the system.

### Step 2: Identify the Characteristics of the Isotherm
The Freundlich isotherm indicates that the adsorption process is heterogeneous and that the amount of gas adsorbed increases with pressure but at a decreasing rate. The value of \( n \) indicates the nature of the adsorption:
- If \( n < 1 \), the adsorption is favorable,
- If \( n = 1 \), it indicates linear adsorption,
- If \( n > 1 \), it indicates unfavorable adsorption.

### Step 3: Discuss the Limitations
While the Freundlich isotherm provides a good approximation for many adsorption processes, it has limitations:
- It does not accurately describe adsorption at very high pressures or temperatures.
- It is an empirical model and does not account for the saturation of the adsorbent.

### Step 4: Conclusion
The Freundlich isotherm explains the behavior of adsorption approximately but may not provide accurate values at very high temperatures or pressures. Therefore, it is important to understand its limitations when applying it to real-world scenarios.

### Final Answer
The Freundlich isotherm explains the behavior of adsorption approximately, especially at high temperatures.

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