The unit of latent heat is

Options

A. cal-g
B. `"cal/".^@C`
C. cal/g
D. none of these

Explanation

To determine the unit of latent heat, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept**: Latent heat is the amount of heat required to change the state of a unit mass of a substance without changing its temperature.

2. **Identify the Formula**: The relationship between heat (Q), mass (m), and latent heat (L) can be expressed as:
\[ Q = m \times L \]
where:
- \( Q \) is the heat absorbed or released,
- \( m \) is the mass of the substance,
- \( L \) is the latent heat.

3. **Rearrange the Formula**: To find the latent heat, we can rearrange the formula:
\[ L = \frac{Q}{m} \]

4. **Identify Units**:
- The unit of heat (Q) is typically measured in calories (Cal).
- The unit of mass (m) is measured in grams (g).

5. **Substitute the Units**: By substituting the units into the rearranged formula, we get:
\[ L = \frac{\text{Cal}}{\text{g}} \]
This indicates that the unit of latent heat is calories per gram.

6. **Conclusion**: Therefore, the unit of latent heat is:
\[ \text{Cal/g} \]

### Final Answer:
The unit of latent heat is **Calorie per gram (Cal/g)**.

---