Value of Henry's constant `K_(H)`………..

Options

A. increase with increase in temperature
B. decrease with increase in temperature
C. remains constant
D. first increases then decreases

Explanation

To determine the value of Henry's constant \( K_H \) and its dependence on temperature, we can follow these steps:

### Step 1: Understand Henry's Law
Henry's Law states that the amount of gas that dissolves in a liquid at a given temperature is directly proportional to the partial pressure of that gas above the liquid. This relationship can be expressed mathematically as:
\[ C = K_H \cdot P \]
where:
- \( C \) is the concentration of the dissolved gas,
- \( K_H \) is Henry's constant,
- \( P \) is the partial pressure of the gas.

### Step 2: Analyze the Dependence of \( K_H \) on Temperature
From experimental observations, it has been found that Henry's constant \( K_H \) is directly proportional to temperature. This means that as the temperature increases, the value of \( K_H \) also increases.

### Step 3: Relate \( K_H \) and Solubility
Henry's constant is inversely proportional to the solubility of the gas in the liquid. Therefore, as the temperature decreases, the solubility of the gas increases, leading to a decrease in \( K_H \). Conversely, as the temperature increases, the solubility decreases, leading to an increase in \( K_H \).

### Step 4: Conclusion
Based on the relationship between temperature and Henry's constant, we can conclude:
- As temperature increases, \( K_H \) increases (gas solubility decreases).
- As temperature decreases, \( K_H \) decreases (gas solubility increases).

### Final Answer
The value of Henry's constant \( K_H \) **increases with temperature**.

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