The temperature at which the second virial coefficient of a real gas is zero is called .

Options

A. Critical temperature
B. Triple point
C. Boiling point
D. Boyle's temperature

Explanation

To solve the question, "The temperature at which the second virial coefficient of a real gas is zero is called," we can follow these steps:

### Step 1: Understand the Virial Coefficient
The virial coefficients (A, B, C, etc.) are used in the virial equation of state, which describes the behavior of real gases. The second virial coefficient (B) is particularly important as it provides insight into the interactions between gas molecules.

### Step 2: Identify the Condition for B = 0
The question specifically asks for the temperature at which the second virial coefficient (B) is zero. This condition indicates that the gas behaves ideally, meaning that the interactions between gas molecules are negligible.

### Step 3: Relate to Boyle's Temperature
The temperature at which the second virial coefficient is zero is known as Boyle's temperature (T_B). At this temperature, the gas follows the ideal gas law (PV = nRT) without deviations due to intermolecular forces.

### Step 4: Conclusion
Thus, the temperature at which the second virial coefficient of a real gas is zero is called **Boyle's temperature**.

### Final Answer:
The temperature at which the second virial coefficient of a real gas is zero is called **Boyle's temperature**.

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