The SI unit of calorific value is joules per _____.

Options

A. kilogram
B. Gram
C. Erg
D. Sec

Answer

To find the SI unit of calorific value, we will follow these steps:

### Step-by-Step Solution:

1. **Understanding Calorific Value**:
- Calorific value refers to the amount of heat produced when a specific quantity of fuel is completely burned in the presence of oxygen.

2. **Identifying the Quantity of Fuel**:
- The calorific value is typically measured for 1 kilogram of fuel.

3. **Determining the Unit of Heat**:
- The standard unit of heat in the International System of Units (SI) is the joule (J).

4. **Combining the Units**:
- Since calorific value is defined as the amount of heat produced per unit mass of fuel, we express it as joules per kilogram.

5. **Final Answer**:
- Therefore, the SI unit of calorific value is joules per kilogram (J/kg).