Which of the following is not an intensive property ?

Options

A. a. Heat capacity
B. b. Temperature
C. c. Specific volume
D. d. Molar mass

Explanation

To determine which of the following is not an intensive property, we first need to understand the definitions of intensive and extensive properties:

1. **Intensive Properties**: These are properties that do not depend on the amount of substance present. Examples include temperature, pressure, density, and color.

2. **Extensive Properties**: These are properties that do depend on the amount of substance present. Examples include mass, volume, and heat capacity.

Now, let's analyze the options given in the question:

**Option A: Heat Capacity**
- Heat capacity is defined as the amount of heat required to raise the temperature of a substance by one degree Celsius. Since heat capacity depends on the mass of the substance (more mass requires more heat to change its temperature), it is an extensive property.

**Option B: Temperature**
- Temperature is a measure of the average kinetic energy of the particles in a substance. It does not depend on the amount of substance present, making it an intensive property.

**Option C: Specific Volume**
- Specific volume is defined as the volume per unit mass of a substance (specific volume = volume/mass). Since it is a ratio of two extensive properties (volume and mass), specific volume is an intensive property.

**Option D: Molar Mass**
- Molar mass is defined as the mass of one mole of a substance. It is also a ratio of two extensive properties (mass and amount of substance), making it an intensive property.

After analyzing all the options, we conclude that:

- **Heat Capacity (Option A)** is the only property listed that is not an intensive property; it is an extensive property.

### Final Answer:
**The correct answer is Option A: Heat Capacity.**