The quantity required to increase the temperature of a body by 1 Kelvin is called -

Options

A. specific heat
B. water equivalent
C. thermal capacity
D. molar specific heat

Answer

To solve the question regarding the quantity required to increase the temperature of a body by 1 Kelvin, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Concept**:
- The question asks for the term that describes the quantity of heat required to raise the temperature of a body by 1 Kelvin.

2. **Heat and Temperature Relationship**:
- According to thermodynamics, the amount of heat (Q) required to change the temperature (ΔT) of a substance is directly proportional to the change in temperature. This can be expressed mathematically as:
\[ Q \propto \Delta T \]

3. **Introducing the Constant**:
- To express this relationship more formally, we introduce a constant of proportionality, denoted as C (which stands for heat capacity). Thus, we can write:
\[ Q = C \cdot \Delta T \]

4. **Setting the Change in Temperature**:
- If we specifically consider a change in temperature of 1 Kelvin (ΔT = 1 K), the equation simplifies to:
\[ Q = C \cdot 1 \]
- Therefore, we can conclude that:
\[ Q = C \]

5. **Identifying the Term**:
- The constant C in this context is defined as the heat capacity of the body. It represents the amount of heat required to raise the temperature of the body by 1 Kelvin.

6. **Conclusion**:
- Thus, the quantity required to increase the temperature of a body by 1 Kelvin is called **heat capacity** or **thermal capacity**.

### Final Answer:
The correct term is **heat capacity** (or thermal capacity).

---