Which of the following pairs is an extensive property ?

Options

A. Mass, temperature
B. Enthalpy, surface tension
C. Viscocity, work
D. Volume, entropy

Answer

To solve the question regarding which of the following pairs is an extensive property, we need to first understand what extensive properties are.

### Step-by-Step Solution:

1. **Define Extensive Properties**: Extensive properties are those that depend on the amount of substance present in a system. Common examples include mass, volume, and energy.

2. **Identify the Properties in the Given Pairs**: We need to evaluate the properties in the pairs provided in the question. Let's assume the pairs are:
- Pair 1: Mass and Temperature
- Pair 2: Volume and Pressure
- Pair 3: Energy and Viscosity
- Pair 4: Entropy and Surface Tension

3. **Analyze Each Pair**:
- **Pair 1 (Mass and Temperature)**: Mass is an extensive property (depends on the amount of substance), while temperature is an intensive property (does not depend on the amount of substance).
- **Pair 2 (Volume and Pressure)**: Volume is an extensive property, but pressure is an intensive property.
- **Pair 3 (Energy and Viscosity)**: Energy is an extensive property, while viscosity is an intensive property.
- **Pair 4 (Entropy and Surface Tension)**: Entropy is an extensive property, while surface tension is an intensive property.

4. **Conclusion**: From the analysis, we see that in each pair, one property is extensive and the other is intensive. Therefore, we need to find a pair where both properties are extensive.

5. **Final Answer**: The pair that consists of two extensive properties is **Volume and Entropy**.